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Phase 3 Study of TAK-438 10 mg in the Treatment of Non-Erosive Gastroesophageal Reflux Disease (NERD)

A Randomized, Double-Blind, Placebo-Controlled, Multicenter, Phase 3 Study to Evaluate the Efficacy and Safety of Oral TAK-438 10 mg Once-daily in the Treatment of Non-Erosive Gastroesophageal Reflux Disease

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02954848
Enrollment
484
Registered
2016-11-04
Start date
2016-11-15
Completion date
2018-02-26
Last updated
2019-08-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Non-erosive Gastroesophageal Reflux Disease

Keywords

Drug therapy

Brief summary

The purpose of this study was to evaluate the efficacy and safety of oral TAK-438 10 mg once-daily in the treatment of non-erosive gastroesophageal reflux disease (NERD).

Detailed description

A phase 3, randomized, double-blind, placebo-controlled, parallel-group, multi-center study will be conducted to verify the superiority of TAK-438 (TAK-438 10 mg, once daily, 4 weeks) to placebo (placebo, once daily, 4 weeks) in participants with non-erosive gastroesophageal reflux disease (NERD). The study consists of a 1-week, single-blind run-in period and a 4-week, double-blind treatment period. The participants will receive the study drug (TAK-438 placebo tablet) for the 1-week single-blind run-in period. After the run-in period, eligible participants will be randomized into TAK-438 10 mg or placebo treatment groups in a 1:1 ratio. The randomized participants will receive the assigned study drug (TAK-438 10 mg tablet or placebo tablet) for the 4-week double-blind treatment period.

Interventions

DRUGPlacebo

TAK-438 placebo-matching tablets

DRUGTAK-438 10 mg

TAK-438 tablets

Sponsors

Takeda
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
20 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. In the opinion of the investigator, the participant is capable of understanding and complying with protocol requirements. 2. The participant signs and dates a written informed consent form prior to the initiation of any study procedures. 3. The participant with NERD. 4. The participant is endoscopically confirmed to have the modified Los Angeles (LA) Classification Grade N or M at the start of the run-in period (Visit 1). To allow efficacy evaluation in the participants with Grade N as well as in those with Grade M, the target number of participants in each grade is at least 30% of the total number of participants. Enrollment of patients with either Grade N or M will end when the number of enrolled participants with each grade exceeds 332, or 70% of the total planned number of participants. 5. The participant experiences recurrent heartburn, on at least 2 days a week over the last 3 weeks prior to the start of the run-in period (Visit 1). 6. The participant is either a male or female outpatient with a minimum age of 20 years at the time of informed consent signing. However, participants who are hospitalized only for examination purposes are also allowed to participate. 7. A female participant of childbearing potential agrees to use routinely adequate contraception from signing of informed consent throughout the duration of the study, and for 4 weeks after the last dose of study drug. 8. The participant's compliance to the study drug has been good (75% or better) in the run-in period. 9. The participant has experienced heartburn on at least 2 days in the last 1 week prior to randomization. 10. The participant has appropriately provided in the patient's diary all the required information during the run-in period.

Exclusion criteria

1. The participant has received any investigational compound within 84 days prior to the first dose of study drug. 2. The participant has received TAK-438 in a previous clinical study or as a therapeutic agent, except one with experience of receiving TAK-438 as an adjunct therapy for H. pylori eradication, who can be enrolled in this study. 3. The participant is an immediate family member, study site employee, or is in a dependent relationship with a study site employee who is involved in conduct of this study (eg, spouse, parent, child, sibling) or may consent under duress. 4. The participant has donated at least 400 mL of blood within the 90 days prior to the start of the run-in period (Visit 1). 5. Endoscopic examination for entering this study fails to diagnose NERD within 84 days before the start of the run-in period (Visit 1). 6. The participant has any complications affecting the esophagus, including Barrett's esophagus (3 cm or more, long segment Barrett's esophagus \[LSBE\]), eosinophilic esophagitis, esophageal varices, scleroderma, viral or fungal infection, and esophageal stenosis; a history of radiation therapy or cryotherapy for the esophagus; or caustic or physiochemical trauma (eg, esophageal sclerotherapy). However, participants with Barrett's mucosa (less than 3 cm, short segment Barrett's esophagus \[SSBE\]) or Schatzki's ring (a mucosal tissue ring lining the inferior esophageal sphincter) are permitted to participate. 7. The participant has a history of surgery or treatment affecting gastroesophageal reflux, including fundoplication and mechanical dilatation for esophageal stenosis (except Schatzki's ring), or a history of gastric or duodenal surgery (except endoscopic removal of benign polyps). 8. The participant has acute upper gastrointestinal bleeding or gastric or duodenal ulcer, characterized by a defective mucosa with white coating, within 30 days prior to the start of the run-in period (Visit 1). However, participants with gastric or duodenal erosion are permitted to participate. 9. The participant has acute gastritis or acute exacerbation of chronic gastritis. 10. The participant has, or has a history of, Zollinger-Ellison syndrome or gastric acid hypersecretion disorders. 11. The participant has, or has a history of chest pain due to cardiac disease, or has chest pain suspectedly caused by cardiac disease within 1 year prior to the start of the run-in period (Visit 1). 12. The participant has any other concurrent upper gastrointestinal symptoms more severe than heartburn. 13. The participant has depression. 14. The participant has, has a history of, or is suspected of functional upper gastrointestinal disorders, such as functional dyspepsia and functional heartburn diagnosed by the Rome IV criteria. 15. The participant has a history of hypersensitivity or allergies to TAK-438 (including the formulation excipients). 16. The participant has a history or complication of drug abuse (defined as any illicit drug use) or of alcohol abuse within 1 years prior to the start of the run-in period (Visit 1). 17. The participant requires any excluded medications or treatments. 18. The female participant who is pregnant, is lactating, or is intending to become pregnant or to donate ova any time between the informed consent signing and 4 weeks after the last dose of study drug. 19. The participant has any serious neurological, cardiovascular, pulmonary, hepatic, renal, metabolic, gastrointestinal, urologic, endocrinological, or hematologic diseases. 20. The participant needs surgery requiring hospitalization during the course of the study, or surgery requiring hospitalization is scheduled for the participant during the course of the study. 21. The participant has a history of malignancy or is treated for malignancy within 5 years prior to the start of the run-in period (Visit 1). However, participants who have recovered completely from cutaneous basal cell carcinoma or from cervical carcinoma in situ are permitted to participate. 22. The participant has acquired immunodeficiency syndrome (AIDS) or hepatitis, is a human immunodeficiency virus (HIV) carrier, or tested positive for the hepatitis B virus surface antigen (HBsAg) or the hepatitis C virus (HCV) antibody. However, participants who tested negative for HCV antigen or HCV-RNA are permitted to participate. 23. The participant has any of the following abnormal clinical laboratory test values at the start of the run-in period (Visit 1): * Creatinine \> 2 mg/dL. * Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) \> upper limit of normal (ULN). * Bilirubin (Total bilirubin) \> ULN.

Design outcomes

Primary

MeasureTime frameDescription
Percentage of Days Without Symptoms of HeartburnUp to Week 4Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. Reported data was the percentage of days for each group, calculated by the number of days without heartburn divided by the number of days of treatment period.
Cumulative Rate of Improvement in Symptoms of HeartburnDay 0 to Day 24Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. Cumulative rate of improvement was calculated as percentage of participants who experienced symptom improvement. Symptom improvement was defined as symptoms experienced on less than 2 days of the last 7 days. The cumulative data was collected between Day 0 and Day 24 and is reported for the following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24. Data not collected were shown as NA = Not Applicable.
Severity of Symptoms of HeartburnUp to Week 4Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. The severity of heartburn was calculated by the number of severity score in daily diaries.

Secondary

MeasureTime frameDescription
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 0 to Day 24Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in daily participant diary. The score range was 0-4, with higher scores reflecting the greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response evaluated per Criteria 2, i.e. Improved: proportion of days participant experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than that during run-in period; Not improved: proportion of days participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal to or larger than that during the run-in period. Cumulative data was collected between Day 0 and Day 24 and is reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24. Data not collected were shown as NA=Not Applicable.
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 0 to Day 24Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in daily participant diary. The score range was 0-4, with higher scores reflecting the greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. The response evaluated per Criteria 2, i.e. Improved: proportion of days participant experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than that during run-in period; Not improved: proportion of days participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal to or larger than that during run-in period. Cumulative data was collected between Day 0 and Day 24 and is reported for following time points: Days 0, 5, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24. Data not collected shown as NA=Not Applicable.
Severity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Up to Week 4Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, the higher scores indicates greater severity. The severity was calculated in each subgroup of response (improved or not improved) according to Criteria 1, i.e. Improved: participants experienced heartburn on less than 2 days of the 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: participants experienced heartburn on 2 days or more of the 7 days prior to Week 2 \[Day 8 through Day 14\] and Criteria 2, i.e. Improved: proportion of days the participants experienced heartburn during the treatment period up to Week 2 \[Day 14\] was lower than that during the run-in period; Not improved: proportion of days the participants experienced heartburn during the treatment period up to Week 2 \[Day 14\] was equal to or larger than that during the run-in period.
Percentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at BaselineUp to Week 4Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, higher scores indicates greater severity. The percentage was calculated in each subgroup of the endoscopic findings where Grade N: normal mucosa; Grade M: minimal changes to the mucosa, such as erythema and/or whitish turbidity; Grade A: non-confluent mucosal breaks \<5mm in length; Grade B: non-confluent mucosal breaks ≥5mm in length; Grade C: confluent mucosal breaks \<75% circumferential; Grade D: confluent mucosal breaks \>75% circumferential.
Cumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 0 to Day 24Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. The score range was 0-4, higher scores indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Cumulative rate calculated in subgroup of Grade N per modified LA classification. Modified LA classification Grade N: normal mucosa; Grade M: minimal changes to mucosa; Grade A: nonconfluent mucosal breaks \<5mm in length; Grade B: non-confluent mucosal breaks ≥5mm in length; Grade C: confluent mucosal breaks \<75% circumferential; Grade D: confluent mucosal breaks \>75% circumferential. Cumulative data collected between Day 0 and 24 and reported for time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 and 24. Data not collected shown as NA=Not Applicable.
Cumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 0 to Day 24Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher scores indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Cumulative rate calculated in subgroup of Grade M per modified LA classification. Modified LA classification Grade N: normal mucosa; Grade M: minimal changes to mucosa; Grade A: nonconfluent mucosal breaks \<5mm in length; Grade B: non-confluent mucosal breaks ≥5mm in length; Grade C: confluent mucosal breaks \<75% circumferential; Grade D: confluent mucosal breaks \>75% circumferential. Cumulative data collected between Day 0 and 24 and reported for time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 and 24. Data not collected shown as NA=Not Applicable.
Severity of Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at BaselineUp to Week 4Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. The severity of heartburn was calculated in each subgroup of the endoscopic findings where Grade N: normal mucosa; Grade M: minimal changes to the mucosa, such as erythema and/or whitish turbidity; Grade A: non-confluent mucosal breaks \<5mm in length; Grade B: non-confluent mucosal breaks ≥5mm in length; Grade C: confluent mucosal breaks \<75% circumferential; Grade D: confluent mucosal breaks \>75% circumferential.
Percentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Up to Week 4Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, higher scores indicates greater severity. The percentage was calculated in each subgroup (response; Grade N and improved, response; Grade N and not improved, response; Grade M and improved, response; Grade M and not improved) according to Criteria 1 and 2. The modified LA classification Grade N indicates the participants with normal mucosa and Grade M indicates the participants with minimal changes to the mucosa.
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 0 to Day 22Participants recorded the presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher scores indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 1, i.e. Improved: participants experienced heartburn on less than 2 days of 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: participants experienced heartburn on 2 days or more of the 7 days prior to Week 2 \[Day 8 through Day 14\]. Modified LA classification Grade N: normal mucosa and Grade M: minimal changes to the mucosa. Cumulative data was collected between Day 0 and Day 22 and is reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 11, 19, 20, and 22. Data not collected were shown as NA=Not Applicable.
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 0 to Day 24Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher scores indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 1, i.e. Improved: participants experienced heartburn on less than 2 days of 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: participants experienced heartburn on 2 days or more of 7 days prior to Week 2 \[Day 8 through Day 14\]. Modified LA classification Grade N indicates participants with normal mucosa and Grade M indicates participants with minimal changes to mucosa). Cumulative data was collected between Day 0 and Day 22 and is reported for following time points: Days 0, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 and 22. Data not collected were shown as NA=Not Applicable.
Percentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Up to Week 4Participants recorded the presence and severity of heartburn in a daily participant diary. Percentage of days without heartburn was calculated in each subgroup of the response (improved or not improved) according to Criteria 1, i.e. Improved: the participants experienced heartburn on less than 2 days of the 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: the participants experienced heartburn on 2 days or more of the 7 days prior to Week 2 \[Day 8 through Day 14\] and Criteria 2, i.e. Improved: the proportion of days the participants experienced heartburn during the treatment period up to Week 2 \[Day 14\] was lower than that during the run-in period; Not improved: the proportion of days the participants experienced heartburn during the treatment period up to Week 2 \[Day 14\] was equal to or larger than that during the run-in period.
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 0 to Day 24Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in a daily participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response evaluated per Criteria 1, i.e. Improved: participants experienced heartburn on \< 2 days of the 7 days prior to Week 2 \[Day 8 to 14\]; Not improved: participants experienced heartburn on \>= 2 days of 7 days prior to Week 2 \[Day 8 to 14\]. Modified LA classification Grade N indicates participants with normal mucosa and Grade M indicates participants with minimal changes to mucosa). Cumulative data collected between Day 0 and 24 and reported for following time points: Days 0, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24. Data not collected were shown as NA=Not Applicable.
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 0 to Day 22Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 2, i.e. Improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than during run-in period; Not improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal to or larger than during run-in period. Modified LA classification Grade N: normal mucosa and Grade M: minimal changes to mucosa). Cumulative data collected between Day 0 and 22 and reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, and 22. Data not collected shown as NA=Not Applicable.
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 0 to Day 24Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement was calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 2, i.e. Improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than during run-in period; Not improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal to or larger than during run-in period. Modified LA classification Grade N: normal mucosa and Grade M: minimal changes to mucosa. Cumulative data was collected between Day 0 and Day 24 and is reported for following time points: Days 0, 5, 9, 11, 12, 13, 14, 19, 20, 21, 22, 23, and 24. Data not collected were shown as NA=Not Applicable.
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 0 to Day 24Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 2, i.e. Improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than during run-in period; Not improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal or larger than during run-in period. Modified LA classification Grade N: normal mucosa and Grade M: minimal changes to mucosa. Cumulative data collected between Day 0 and 24 and reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24. Data not collected shown as NA=Not Applicable.
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 0 to Day 23Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe: 4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 2, i.e. Improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than during run-in period; Not improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal to or larger than during run-in period. Modified LA classification Grade N: normal mucosa and Grade M: minimal changes to mucosa). Cumulative data was collected between Day 0 and Day 23 and is reported for following time points: Days 0, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, and 23. Data not collected shown as NA=Not Applicable.
Severity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Up to Week 4Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. The mean severity of heartburn was calculated in each subgroup (response; Grade N and improved, response; Grade N and not improved, response; Grade M and improved, response; Grade M and not improved) according to criteria 1 and 2. The modified LA classification Grade N indicates the participants with normal mucosa and Grade M indicates the participants with minimal changes to the mucosa.
Percentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryUp to Week 4Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, higher score indicates greater severity. The percentage was calculated in each subgroup of the response (improved or not improved) in the participants who had a medication history of any of acid suppressants. The acid suppressants include proton pump inhibitors \[PPIs\], histamine H2-receptor antagonists \[H2RAs\], or other agents \[anticholinergics or anti-gastrin drugs\].
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryUp to Week 4Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Cumulative improvement rate calculated in each subgroup of the response (improved or not improved) in participants who had medication history of any of acid suppressants. Acid suppressants include proton pump inhibitors \[PPIs\], histamine H2-receptor antagonists \[H2RAs\], or other agents \[anticholinergics or anti-gastrin drugs\]. Cumulative data collected between Day 0 and Day 23 and is reported for following time points: Days 0, 1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 and 23. Data not collected were shown as NA=Not Applicable.
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryUp to Week 4Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Cumulative improvement rate calculated in each subgroup of the response (improved or not improved) in participants who had medication history of any of acid suppressants. Acid suppressants include proton pump inhibitors \[PPIs\], histamine H2-receptor antagonists \[H2RAs\], or other agents \[anticholinergics or anti-gastrin drugs\]. Cumulative data was collected between Day 0 and Day 23 and is reported for following time points: Days 0, 1, 5, 9, 16, 19, and 20. Data not collected were shown as NA=Not Applicable.
Severity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryUp to Week 4Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. The mean severity of heartburn was calculated in each subgroup of the response (improved or not improved) in the participants who had a medication history of any of acid suppressants. The acid suppressants include proton pump inhibitors \[PPIs\], histamine H2-receptor antagonists \[H2RAs\], or other agents \[anticholinergics or anti-gastrin drugs\].
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 0 to Day 22Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 1, i.e. Improved: participants experienced heartburn on less than 2 days of 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: participants experienced heartburn on 2 days or more of 7 days prior to Week 2 \[Day 8 through Day 14\]. Modified LA classification Grade N indicates participants with normal mucosa and Grade M indicates participants with minimal changes to mucosa). Cumulative data collected between Day 0 and Day 22 and is reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 11, 15, 16, 17, 18, 20, 21 and 22. Data not collected were shown as NA=Not Applicable.
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 0 to Day 22Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. Cumulative rate of improvement was calculated as percentage of participants who experienced symptom improvement. The response was evaluated per Criteria 1, i.e. Improved: the participants experienced heartburn on less than 2 days of the 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: the participants experienced heartburn on 2 days or more of the 7 days prior to Week 2 \[Day 8 through Day 14\]. Cumulative data was collected between Day 0 and Day 22 and is reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 11, 15, 16, 17, 18, 19, 20, 21, and 22. Data not collected were shown as NA = Not Applicable.
Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 0 to Day 24Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. Cumulative rate of improvement is calculated as percentage of participants who experienced symptom improvement. The response was evaluated per Criteria 1, i.e. Improved: the participants experienced heartburn on less than 2 days of the 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: the participants experienced heartburn on 2 days or more of the 7 days prior to Week 2 \[Day 8 through Day 14\]. Cumulative data was collected between Day 0 and Day 24 and is reported for following time points: Days 0, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 and 24. Data not collected were shown as NA = Not Applicable.

Countries

Japan

Participant flow

Recruitment details

Participants took part in the study at 44 investigative sites in Japan from 15 November 2016 to 26 February 2018.

Pre-assignment details

Participants with a diagnosis of non-erosive gastroesophageal reflux disease (NERD) were enrolled and received one tablet of placebo orally, once daily in a run-in period. After that, the participants who met all the entry criteria were randomized in 1:1 ratio to receive TAK-438 10 mg or TAK-438 placebo-matching tablets.

Participants by arm

ArmCount
Placebo
TAK-438 placebo-matching tablets, orally, once daily after breakfast for 1 week in run-in period followed by TAK-438 placebo-matching tablets, orally, once daily after breakfast for up to 4 weeks in treatment period.
245
TAK-438 10 mg
TAK-438 placebo-matching tablets, orally, once daily after breakfast for 1 week in run-in period followed by TAK-438 10 mg tablets, orally, once daily after breakfast for up to 4 weeks in treatment period.
239
Total484

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyAdverse Event23
Overall StudyRandomized but Not Treated01
Overall StudyWithdrawal by Participant01

Baseline characteristics

CharacteristicPlaceboTotalTAK-438 10 mg
Age, Continuous51.8 years
STANDARD_DEVIATION 15.38
52.3 years
STANDARD_DEVIATION 14.88
52.8 years
STANDARD_DEVIATION 14.37
Barrett's Mucosa
No
189 Participants377 Participants188 Participants
Barrett's Mucosa
Yes (Less than 3 cm)
56 Participants107 Participants51 Participants
Body Mass Index (BMI)22.67 kg/m^2
STANDARD_DEVIATION 3.431
22.69 kg/m^2
STANDARD_DEVIATION 3.4
22.71 kg/m^2
STANDARD_DEVIATION 3.375
Consumption of Alcohol
Drank a Couple of Days Per Month
54 Participants108 Participants54 Participants
Consumption of Alcohol
Drank a Couple of Days Per Week
62 Participants125 Participants63 Participants
Consumption of Alcohol
Drank Every Day
59 Participants105 Participants46 Participants
Consumption of Alcohol
Never Drank
70 Participants146 Participants76 Participants
Consumption of Caffeine
Had Caffeine Consumption
192 Participants382 Participants190 Participants
Consumption of Caffeine
Had No Caffeine Consumption
53 Participants102 Participants49 Participants
Endoscopic Findings by Central Adjudication Committee (CAC)
Grade M
168 Participants325 Participants157 Participants
Endoscopic Findings by Central Adjudication Committee (CAC)
Grade N
77 Participants159 Participants82 Participants
Endoscopic Findings by Principal Investigator (PI)
Grade M
163 Participants321 Participants158 Participants
Endoscopic Findings by Principal Investigator (PI)
Grade N
82 Participants163 Participants81 Participants
Esophageal Hiatal Hernia
No
146 Participants282 Participants136 Participants
Esophageal Hiatal Hernia
Yes (2 cm or More)
17 Participants35 Participants18 Participants
Esophageal Hiatal Hernia
Yes (Less than 2 cm)
82 Participants167 Participants85 Participants
Factors and Improvement: Above Factors are NA or cannot be Specified
No
241 Participants472 Participants231 Participants
Factors and Improvement: Above Factors are NA or cannot be Specified
Yes
4 Participants12 Participants8 Participants
Factors and Improvement: Diet, Acidic Foods (Citrus Fruits, Carb. Beverage)
No
166 Participants339 Participants173 Participants
Factors and Improvement: Diet, Acidic Foods (Citrus Fruits, Carb. Beverage)
Yes
79 Participants145 Participants66 Participants
Factors and Improvement: Diet, Carbohydrates (Grains, Potatoes, etc.)
No
130 Participants279 Participants149 Participants
Factors and Improvement: Diet, Carbohydrates (Grains, Potatoes, etc.)
Yes
115 Participants205 Participants90 Participants
Factors and Improvement: Diet, Fatty Foods (Fried Foods, Stodge, etc.)
No
80 Participants163 Participants83 Participants
Factors and Improvement: Diet, Fatty Foods (Fried Foods, Stodge, etc.)
Yes
165 Participants321 Participants156 Participants
Factors and Improvement: Diet, Other
No
240 Participants466 Participants226 Participants
Factors and Improvement: Diet, Other
Yes
5 Participants18 Participants13 Participants
Factors and Improvement: Diet, Spices (Pepper, Curry, etc.)
No
162 Participants324 Participants162 Participants
Factors and Improvement: Diet, Spices (Pepper, Curry, etc.)
Yes
83 Participants160 Participants77 Participants
Factors and Improvement: Diet, Sweet Foods (Chocolate, etc.)
No
158 Participants319 Participants161 Participants
Factors and Improvement: Diet, Sweet Foods (Chocolate, etc.)
Yes
87 Participants165 Participants78 Participants
Factors and Improvement: Habits, Caffeine Ingestion
No
133 Participants260 Participants127 Participants
Factors and Improvement: Habits, Caffeine Ingestion
Yes
112 Participants224 Participants112 Participants
Factors and Improvement: Habits, Drinking Alcohol
No
166 Participants337 Participants171 Participants
Factors and Improvement: Habits, Drinking Alcohol
Yes
79 Participants147 Participants68 Participants
Factors and Improvement: Habits, Smoking
No
216 Participants436 Participants220 Participants
Factors and Improvement: Habits, Smoking
Yes
29 Participants48 Participants19 Participants
Factors and Improvement: Improving Lifestyle
No
161 Participants303 Participants142 Participants
Factors and Improvement: Improving Lifestyle
Yes
84 Participants181 Participants97 Participants
Factors and Improvement: Movement, Forward Flexion
No
140 Participants296 Participants156 Participants
Factors and Improvement: Movement, Forward Flexion
Yes
105 Participants188 Participants83 Participants
Factors and Improvement: Movement, Lying in Bed
No
146 Participants296 Participants150 Participants
Factors and Improvement: Movement, Lying in Bed
Yes
99 Participants188 Participants89 Participants
Factors and Improvement: Movement, Other
No
232 Participants459 Participants227 Participants
Factors and Improvement: Movement, Other
Yes
13 Participants25 Participants12 Participants
Factors and Improvement: Physical Factors, Evident Obesity
No
231 Participants455 Participants224 Participants
Factors and Improvement: Physical Factors, Evident Obesity
Yes
14 Participants29 Participants15 Participants
Factors and Improvement: Physical Factors, Kyphosis
No
241 Participants472 Participants231 Participants
Factors and Improvement: Physical Factors, Kyphosis
Yes
4 Participants12 Participants8 Participants
Gastrin91.6 pg/mL
STANDARD_DEVIATION 53.29
97.3 pg/mL
STANDARD_DEVIATION 133.83
103.1 pg/mL
STANDARD_DEVIATION 182.68
Height161.7 cm
STANDARD_DEVIATION 8.62
161.1 cm
STANDARD_DEVIATION 8.97
160.5 cm
STANDARD_DEVIATION 9.29
History of H. pylori Eradication
More than One Year Before
58 Participants107 Participants49 Participants
History of H. pylori Eradication
No
185 Participants374 Participants189 Participants
History of H. pylori Eradication
Within the Last Year
2 Participants3 Participants1 Participants
Race and Ethnicity Not Collected0 Participants
Ratio of Pepsinogen I to Pepsinogen II7.63 ratio
STANDARD_DEVIATION 2.722
7.60 ratio
STANDARD_DEVIATION 2.585
7.57 ratio
STANDARD_DEVIATION 2.442
Region of Enrollment
Japan
245 Participants484 Participants239 Participants
Response to Acid Suppressants
Heartburn has been Resolved
31 Participants76 Participants45 Participants
Response to Acid Suppressants
Heartburn has not been Resolved but Relieved
52 Participants95 Participants43 Participants
Response to Acid Suppressants
Heartburn has Remained Unchanged
8 Participants13 Participants5 Participants
Response to Acid Suppressants
Improved
83 Participants171 Participants88 Participants
Response to Acid Suppressants
Not Improved
8 Participants13 Participants5 Participants
Serological Determination for H. pylori
Negative
208 Participants417 Participants209 Participants
Serological Determination for H. pylori
Positive
37 Participants65 Participants28 Participants
Severity of Symptoms, Heartburn1.641 score on a scale
STANDARD_DEVIATION 0.5747
1.702 score on a scale
STANDARD_DEVIATION 0.5986
1.765 score on a scale
STANDARD_DEVIATION 0.6171
Severity of Symptoms, Regurgitation1.074 score on a scale
STANDARD_DEVIATION 0.8398
1.091 score on a scale
STANDARD_DEVIATION 0.8739
1.109 score on a scale
STANDARD_DEVIATION 0.9092
Sex: Female, Male
Female
140 Participants301 Participants161 Participants
Sex: Female, Male
Male
105 Participants183 Participants78 Participants
Smoking Classification
Current Smoker
52 Participants96 Participants44 Participants
Smoking Classification
Ex-smoker
69 Participants136 Participants67 Participants
Smoking Classification
Never Smoked
124 Participants252 Participants128 Participants
Use of H2-Receptor Antagonists (H2RA) Within 180 Days Prior to IC
No
216 Participants427 Participants211 Participants
Use of H2-Receptor Antagonists (H2RA) Within 180 Days Prior to IC
Yes
29 Participants57 Participants28 Participants
Use of Other Agents (Anticholinergics or Anti-gastrin Drugs) within 180 Days Prior to IC
No
221 Participants438 Participants217 Participants
Use of Other Agents (Anticholinergics or Anti-gastrin Drugs) within 180 Days Prior to IC
Yes
24 Participants46 Participants22 Participants
Use of Proton Pump Inhibitors (PPIs) Within 180 Days Prior to Informed Consent (IC)
No
200 Participants384 Participants184 Participants
Use of Proton Pump Inhibitors (PPIs) Within 180 Days Prior to Informed Consent (IC)
Yes
45 Participants100 Participants55 Participants
Weight59.6 kg
STANDARD_DEVIATION 12.04
59.2 kg
STANDARD_DEVIATION 11.61
58.7 kg
STANDARD_DEVIATION 11.15

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 2450 / 238
other
Total, other adverse events
12 / 24510 / 238
serious
Total, serious adverse events
1 / 2450 / 238

Outcome results

Primary

Cumulative Rate of Improvement in Symptoms of Heartburn

Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. Cumulative rate of improvement was calculated as percentage of participants who experienced symptom improvement. Symptom improvement was defined as symptoms experienced on less than 2 days of the last 7 days. The cumulative data was collected between Day 0 and Day 24 and is reported for the following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24. Data not collected were shown as NA = Not Applicable.

Time frame: Day 0 to Day 24

Population: FAS included participants who were randomized and received at least one dose of the study drug.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 215.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 1329.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 720.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 1430.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 417.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 1531.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 821.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 1634.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 114.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 1736.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 923.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 1838.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 518.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 1940.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 10NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 2042.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 316.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 2144.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 1125.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 2248.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 619.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 2351.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 1227.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 24NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of HeartburnDay 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 2471.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 123.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 224.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 325.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 426.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 528.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 630.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 732.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 832.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 934.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 1035.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 1138.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 1241.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 1344.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 1446.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 1548.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 1649.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 1751.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 1854.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 1955.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 2059.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 2159.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 2262.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of HeartburnDay 2366.1 percentage of participants
p-value: 0.0003Log Rank
Primary

Percentage of Days Without Symptoms of Heartburn

Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. Reported data was the percentage of days for each group, calculated by the number of days without heartburn divided by the number of days of treatment period.

Time frame: Up to Week 4

Population: Full analysis set (FAS) included participants who were randomized and received at least one dose of the study drug.

ArmMeasureValue (MEDIAN)
PlaceboPercentage of Days Without Symptoms of Heartburn61.50 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn72.55 percentage of days
p-value: 0.064395% CI: [0, 10.6]Wilcoxon Rank-Sum Test
Primary

Severity of Symptoms of Heartburn

Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. The severity of heartburn was calculated by the number of severity score in daily diaries.

Time frame: Up to Week 4

Population: FAS included participants who were randomized and received at least one dose of the study drug.

ArmMeasureValue (MEDIAN)
PlaceboSeverity of Symptoms of Heartburn1.140 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn1.070 score on a scale
p-value: 0.082695% CI: [-0.24, 0.01]Wilcoxon Rank-Sum Test
Secondary

Cumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at Baseline

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher scores indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Cumulative rate calculated in subgroup of Grade M per modified LA classification. Modified LA classification Grade N: normal mucosa; Grade M: minimal changes to mucosa; Grade A: nonconfluent mucosal breaks \<5mm in length; Grade B: non-confluent mucosal breaks ≥5mm in length; Grade C: confluent mucosal breaks \<75% circumferential; Grade D: confluent mucosal breaks \>75% circumferential. Cumulative data collected between Day 0 and 24 and reported for time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 and 24. Data not collected shown as NA=Not Applicable.

Time frame: Day 0 to Day 24

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable at each category.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 112.9 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 214.7 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 3NA percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 5NA percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 920.9 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1427.6 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 7NA percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 817.8 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 10NA percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1121.5 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1222.7 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1325.2 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1528.8 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1631.9 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1734.4 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1835.6 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1936.9 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 2040.3 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 2142.6 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 2247.0 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 2350.8 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 416.6 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 24NA percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 6NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 2359.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1341.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 123.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1442.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 224.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 325.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 4NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 21NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 527.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1645.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1032.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 629.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1544.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 2055.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1747.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 730.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 2257.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 8NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 9NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1851.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 2463.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1135.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1951.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade M) at BaselineDay 1237.9 percentage of participants
p-value: 0.0153Log Rank
Secondary

Cumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at Baseline

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. The score range was 0-4, higher scores indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Cumulative rate calculated in subgroup of Grade N per modified LA classification. Modified LA classification Grade N: normal mucosa; Grade M: minimal changes to mucosa; Grade A: nonconfluent mucosal breaks \<5mm in length; Grade B: non-confluent mucosal breaks ≥5mm in length; Grade C: confluent mucosal breaks \<75% circumferential; Grade D: confluent mucosal breaks \>75% circumferential. Cumulative data collected between Day 0 and 24 and reported for time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 and 24. Data not collected shown as NA=Not Applicable.

Time frame: Day 0 to Day 24

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable at each category.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 319.5 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 929.3 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 2047.7 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1134.1 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 4NA percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1236.6 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 118.3 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 13NA percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 523.2 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 14NA percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 2252.1 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 15NA percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 624.4 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1639.0 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 2NA percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1740.2 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1843.9 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 726.8 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1946.3 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 2149.1 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 828.0 percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 23NA percentage of participants
PlaceboCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 24NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1247.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 2066.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 2167.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 2378.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 2489.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 122.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 223.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 324.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 427.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 529.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 632.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 736.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 837.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 941.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1143.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1758.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1351.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1454.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1557.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 16NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1861.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 1963.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N) at BaselineDay 2273.4 percentage of participants
p-value: 0.0059Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 1, i.e. Improved: participants experienced heartburn on less than 2 days of 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: participants experienced heartburn on 2 days or more of 7 days prior to Week 2 \[Day 8 through Day 14\]. Modified LA classification Grade N indicates participants with normal mucosa and Grade M indicates participants with minimal changes to mucosa). Cumulative data collected between Day 0 and Day 22 and is reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 11, 15, 16, 17, 18, 20, 21 and 22. Data not collected were shown as NA=Not Applicable.

Time frame: Day 0 to Day 22

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 138.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 11NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 5NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 15NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 3NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1654.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 6NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1756.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 243.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 18NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 7NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2060.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 449.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2163.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 852.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2268.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 22NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 161.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 265.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 366.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 4NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 571.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 676.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 780.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 8NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1181.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1583.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 16NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 17NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1886.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2090.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 21NA percentage of participants
p-value: 0.0004Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)

Participants recorded the presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher scores indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 1, i.e. Improved: participants experienced heartburn on less than 2 days of 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: participants experienced heartburn on 2 days or more of the 7 days prior to Week 2 \[Day 8 through Day 14\]. Modified LA classification Grade N: normal mucosa and Grade M: minimal changes to the mucosa. Cumulative data was collected between Day 0 and Day 22 and is reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 11, 19, 20, and 22. Data not collected were shown as NA=Not Applicable.

Time frame: Day 0 to Day 22

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 778.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 153.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 357.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 4NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 567.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 671.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 882.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 11NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1985.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 20NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2289.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2082.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 666.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 774.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 146.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 19NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 248.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 876.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 351.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 22100.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 456.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1179.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 561.5 percentage of participants
p-value: 0.997Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 2, i.e. Improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than during run-in period; Not improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal or larger than during run-in period. Modified LA classification Grade N: normal mucosa and Grade M: minimal changes to mucosa. Cumulative data collected between Day 0 and 24 and reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24. Data not collected shown as NA=Not Applicable.

Time frame: Day 0 to Day 24

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 119.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1233.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1335.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 6NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1536.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 3NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1639.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 7NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1743.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 18NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 826.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1944.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 424.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2048.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 930.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2150.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 222.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2256.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 10NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 23NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 5NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 24NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1131.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2475.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 132.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 234.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 335.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 4NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 538.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 640.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 742.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 8NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 9NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1045.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1149.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1355.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1556.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1657.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1758.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1861.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1962.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2065.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 21NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 22NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2369.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1251.5 percentage of participants
p-value: 0.0175Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 2, i.e. Improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than during run-in period; Not improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal to or larger than during run-in period. Modified LA classification Grade N: normal mucosa and Grade M: minimal changes to mucosa). Cumulative data collected between Day 0 and 22 and reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, and 22. Data not collected shown as NA=Not Applicable.

Time frame: Day 0 to Day 22

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1647.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 327.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 835.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1854.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2258.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 125.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 4NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 528.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 630.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 733.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 9NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1140.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1244.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 13NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 14NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 15NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1749.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1955.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 20NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 21NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 747.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 849.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1973.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 436.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 16NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 952.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1259.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1567.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1155.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2179.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2284.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1768.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 129.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 231.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 332.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1362.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1872.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 539.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1463.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 642.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2077.5 percentage of participants
p-value: 0.0059Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in a daily participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response evaluated per Criteria 1, i.e. Improved: participants experienced heartburn on \< 2 days of the 7 days prior to Week 2 \[Day 8 to 14\]; Not improved: participants experienced heartburn on \>= 2 days of 7 days prior to Week 2 \[Day 8 to 14\]. Modified LA classification Grade N indicates participants with normal mucosa and Grade M indicates participants with minimal changes to mucosa). Cumulative data collected between Day 0 and 24 and reported for following time points: Days 0, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24. Data not collected were shown as NA=Not Applicable.

Time frame: Day 0 to Day 24

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 115.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1620.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 94.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1723.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 127.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1926.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 10NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2029.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1414.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2132.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2236.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1825.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2342.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1516.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 24NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1311.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2445.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 21NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 9NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 103.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 117.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1210.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1316.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1418.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1520.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1622.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1724.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1828.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1929.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2033.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2236.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2340.1 percentage of participants
p-value: 0.7999Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher scores indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 1, i.e. Improved: participants experienced heartburn on less than 2 days of 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: participants experienced heartburn on 2 days or more of 7 days prior to Week 2 \[Day 8 through Day 14\]. Modified LA classification Grade N indicates participants with normal mucosa and Grade M indicates participants with minimal changes to mucosa). Cumulative data was collected between Day 0 and Day 22 and is reported for following time points: Days 0, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 and 22. Data not collected were shown as NA=Not Applicable.

Time frame: Day 0 to Day 24

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 15NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1616.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1718.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1824.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1925.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2027.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2130.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2232.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 23NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 24NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 91.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 119.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1213.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 13NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 14NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1431.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1536.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2363.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 16NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 119.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1739.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2481.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1843.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1324.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1948.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2051.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1217.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2153.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 97.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 1) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 22NA percentage of participants
p-value: 0.0125Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe: 4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 2, i.e. Improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than during run-in period; Not improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal to or larger than during run-in period. Modified LA classification Grade N: normal mucosa and Grade M: minimal changes to mucosa). Cumulative data was collected between Day 0 and Day 23 and is reported for following time points: Days 0, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, and 23. Data not collected shown as NA=Not Applicable.

Time frame: Day 0 to Day 23

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 133.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 17NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1820.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1411.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1922.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 12NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2024.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1513.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2126.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 91.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2229.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1616.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2343.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 23NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 9NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 122.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 134.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 149.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1514.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 16NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1716.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 1823.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 19NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2029.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 21NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade M)Day 2236.2 percentage of participants
p-value: 0.7505Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement was calculated as percentage of participants who experienced symptom improvement. Response was evaluated per Criteria 2, i.e. Improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than during run-in period; Not improved: participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal to or larger than during run-in period. Modified LA classification Grade N: normal mucosa and Grade M: minimal changes to mucosa. Cumulative data was collected between Day 0 and Day 24 and is reported for following time points: Days 0, 5, 9, 11, 12, 13, 14, 19, 20, 21, 22, 23, and 24. Data not collected were shown as NA=Not Applicable.

Time frame: Day 0 to Day 24

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2235.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 58.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 913.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1117.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 12NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 13NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 14NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1921.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2026.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2130.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 23NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 24NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 21NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 95.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1426.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2239.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 5NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1931.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 24100.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 11NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 20NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1210.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 2359.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Both the Response (Not Improved Per Criteria 2) at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N)Day 1315.8 percentage of participants
p-value: 0.552Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. Cumulative rate of improvement was calculated as percentage of participants who experienced symptom improvement. The response was evaluated per Criteria 1, i.e. Improved: the participants experienced heartburn on less than 2 days of the 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: the participants experienced heartburn on 2 days or more of the 7 days prior to Week 2 \[Day 8 through Day 14\]. Cumulative data was collected between Day 0 and Day 22 and is reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 11, 15, 16, 17, 18, 19, 20, 21, and 22. Data not collected were shown as NA = Not Applicable.

Time frame: Day 0 to Day 22

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable at each category.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 143.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 247.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 348.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 451.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 555.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 656.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 759.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 862.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 11NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 15NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 1663.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 1765.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 18NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 1966.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 2069.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 2170.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 2275.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 19NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 155.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 1581.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 258.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 360.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 16NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 462.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 2087.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 567.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 17NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 672.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 2293.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 777.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 1883.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 878.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 21NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 1) at Week 2Day 1180.8 percentage of participants
p-value: 0.0025Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in daily participant diary. The score range was 0-4, with higher scores reflecting the greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Response evaluated per Criteria 2, i.e. Improved: proportion of days participant experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than that during run-in period; Not improved: proportion of days participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal to or larger than that during the run-in period. Cumulative data was collected between Day 0 and Day 24 and is reported for following time points: Days 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24. Data not collected were shown as NA=Not Applicable.

Time frame: Day 0 to Day 24

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable at each category.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 626.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1338.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 323.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 14NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 728.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1539.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1642.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 425.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1745.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 932.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1847.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 223.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1948.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 10NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 2050.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 526.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 2152.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1134.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 2256.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 121.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 23NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1236.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 24NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 829.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 2478.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 131.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 233.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 334.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 435.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 538.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 641.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 744.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 844.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 946.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1047.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1151.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1254.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1357.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1458.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1560.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1661.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1762.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1865.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 1966.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 2069.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 2170.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 2271.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved Per Criteria 2) at Week 2Day 2374.5 percentage of participants
p-value: 0.0004Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication History

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Cumulative improvement rate calculated in each subgroup of the response (improved or not improved) in participants who had medication history of any of acid suppressants. Acid suppressants include proton pump inhibitors \[PPIs\], histamine H2-receptor antagonists \[H2RAs\], or other agents \[anticholinergics or anti-gastrin drugs\]. Cumulative data collected between Day 0 and Day 23 and is reported for following time points: Days 0, 1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 and 23. Data not collected were shown as NA=Not Applicable.

Time frame: Up to Week 4

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 10NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1732.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 11NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 215.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1226.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 418.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 13NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 520.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1428.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 621.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1530.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 7NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1631.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1833.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 822.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1935.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 2036.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 925.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 21NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 113.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 2241.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 2348.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 12NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 4NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 627.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 17NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 2254.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 2361.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 125.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 5NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 728.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 829.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 9NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1030.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1135.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 226.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1341.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1442.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1543.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 16NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1846.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 19NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 2049.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 2150.8 percentage of participants
p-value: 0.0811Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. Cumulative rate of improvement is calculated as percentage of participants who experienced symptom improvement. The response was evaluated per Criteria 1, i.e. Improved: the participants experienced heartburn on less than 2 days of the 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: the participants experienced heartburn on 2 days or more of the 7 days prior to Week 2 \[Day 8 through Day 14\]. Cumulative data was collected between Day 0 and Day 24 and is reported for following time points: Days 0, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 and 24. Data not collected were shown as NA = Not Applicable.

Time frame: Day 0 to Day 24

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable at each category.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 93.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1721.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1311.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1824.7 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 116.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1926.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1414.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 2029.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 10NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 2131.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1515.4 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 2234.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 129.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 2339.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1619.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 24NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 2455.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 92.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 104.4 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 118.1 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1212.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1318.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1422.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1525.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1626.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1728.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1833.3 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 1935.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 2038.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 2139.5 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 2241.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 1) at Week 2Day 2347.0 percentage of participants
p-value: 0.1059Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in daily participant diary. The score range was 0-4, with higher scores reflecting the greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. The response evaluated per Criteria 2, i.e. Improved: proportion of days participant experienced heartburn during treatment period up to Week 2 \[Day 14\] was lower than that during run-in period; Not improved: proportion of days participants experienced heartburn during treatment period up to Week 2 \[Day 14\] was equal to or larger than that during run-in period. Cumulative data was collected between Day 0 and Day 24 and is reported for following time points: Days 0, 5, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24. Data not collected shown as NA=Not Applicable.

Time frame: Day 0 to Day 24

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable at each category.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 1922.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 52.6 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 95.2 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 116.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 12NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 137.8 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 1413.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 1514.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 1616.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 17NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 1819.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 2024.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 2127.9 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 2231.3 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 2341.1 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 24NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 2450.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 16NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 21NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 5NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 1719.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 91.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 2342.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 11NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 1824.6 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 124.9 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 1926.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 138.2 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 2237.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 1414.8 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 2029.7 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved Per Criteria 2) at Week 2Day 1518.0 percentage of participants
p-value: 0.5393Log Rank
Secondary

Cumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication History

Participants recorded presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in participant diary. Score range was 0-4, higher score indicates greater severity. Cumulative rate of improvement calculated as percentage of participants who experienced symptom improvement. Cumulative improvement rate calculated in each subgroup of the response (improved or not improved) in participants who had medication history of any of acid suppressants. Acid suppressants include proton pump inhibitors \[PPIs\], histamine H2-receptor antagonists \[H2RAs\], or other agents \[anticholinergics or anti-gastrin drugs\]. Cumulative data was collected between Day 0 and Day 23 and is reported for following time points: Days 0, 1, 5, 9, 16, 19, and 20. Data not collected were shown as NA=Not Applicable.

Time frame: Up to Week 4

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (NUMBER)
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 9NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 1637.5 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 00.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 19NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 5NA percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 2050.0 percentage of participants
PlaceboCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 125.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 20NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 00.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 140.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 560.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 16NA percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 19100.0 percentage of participants
TAK-438 10 mgCumulative Rate of Improvement in Symptoms of Heartburn in Subgroup Stratified by Response (Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryDay 980.0 percentage of participants
p-value: 0.0288Log Rank
Secondary

Percentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at Baseline

Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, higher scores indicates greater severity. The percentage was calculated in each subgroup of the endoscopic findings where Grade N: normal mucosa; Grade M: minimal changes to the mucosa, such as erythema and/or whitish turbidity; Grade A: non-confluent mucosal breaks \<5mm in length; Grade B: non-confluent mucosal breaks ≥5mm in length; Grade C: confluent mucosal breaks \<75% circumferential; Grade D: confluent mucosal breaks \>75% circumferential.

Time frame: Up to Week 4

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who had endoscopic findings.

ArmMeasureGroupValue (MEDIAN)
PlaceboPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at BaselineGrade N64.15 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at BaselineGrade M60.70 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at BaselineGrade N76.70 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at BaselineGrade M67.90 percentage of days
Comparison: Statistical analysis for Grade N of endoscopic findingsp-value: 0.14995% CI: [-1.9, 15.3]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Grade M of endoscopic findingsp-value: 0.214695% CI: [-1.4, 10.7]Wilcoxon Rank-Sum Test
Secondary

Percentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2

Participants recorded the presence and severity of heartburn in a daily participant diary. Percentage of days without heartburn was calculated in each subgroup of the response (improved or not improved) according to Criteria 1, i.e. Improved: the participants experienced heartburn on less than 2 days of the 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: the participants experienced heartburn on 2 days or more of the 7 days prior to Week 2 \[Day 8 through Day 14\] and Criteria 2, i.e. Improved: the proportion of days the participants experienced heartburn during the treatment period up to Week 2 \[Day 14\] was lower than that during the run-in period; Not improved: the proportion of days the participants experienced heartburn during the treatment period up to Week 2 \[Day 14\] was equal to or larger than that during the run-in period.

Time frame: Up to Week 4

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable at each category.

ArmMeasureGroupValue (MEDIAN)
PlaceboPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 1, Improved92.00 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 1, Not Improved50.95 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 2, Improved71.40 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 2, Not Improved39.30 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 2, Not Improved24.15 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 1, Improved96.00 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 2, Improved81.15 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 1, Not Improved48.05 percentage of days
Comparison: Statistical analysis for criteria 1, improved responsep-value: 0.047895% CI: [0, 5.3]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for criteria 1, not improved responsep-value: 0.896395% CI: [-6.1, 6]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for criteria 2, improved responsep-value: 0.01295% CI: [0, 10.7]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for criteria 2, not improved responsep-value: 0.087195% CI: [-17.4, 0]Wilcoxon Rank-Sum Test
Secondary

Percentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication History

Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, higher score indicates greater severity. The percentage was calculated in each subgroup of the response (improved or not improved) in the participants who had a medication history of any of acid suppressants. The acid suppressants include proton pump inhibitors \[PPIs\], histamine H2-receptor antagonists \[H2RAs\], or other agents \[anticholinergics or anti-gastrin drugs\].

Time frame: Up to Week 4

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEDIAN)
PlaceboPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryImproved61.30 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryNot Improved49.30 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryImproved71.40 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryNot Improved80.80 percentage of days
Comparison: Statistical analysis for improved responsep-value: 0.188595% CI: [-2.7, 14.3]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for not improved responsep-value: 0.233795% CI: [-19.2, 75]Wilcoxon Rank-Sum Test
Secondary

Percentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)

Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, higher scores indicates greater severity. The percentage was calculated in each subgroup (response; Grade N and improved, response; Grade N and not improved, response; Grade M and improved, response; Grade M and not improved) according to Criteria 1 and 2. The modified LA classification Grade N indicates the participants with normal mucosa and Grade M indicates the participants with minimal changes to the mucosa.

Time frame: Up to Week 4

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEDIAN)
PlaceboPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade N and Improved93.00 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade N and Not Improved53.60 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade M and Improved89.30 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade M and Not Improved49.05 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade N and Improved69.00 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade N and Not Improved50.00 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade M and Improved73.30 percentage of days
PlaceboPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade M and Not Improved33.90 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade M and Not Improved25.00 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade N and Improved92.90 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade N and Improved79.30 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade N and Not Improved53.60 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade M and Improved82.10 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade M and Improved96.40 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade N and Not Improved22.95 percentage of days
TAK-438 10 mgPercentage of Days Without Symptoms of Heartburn Stratified by Subgroup of Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade M and Not Improved44.40 percentage of days
Comparison: Statistical analysis for Criteria 1, Grade N and improved responsep-value: 0.663195% CI: [-5, 3.5]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 1, Grade N and not improved responsep-value: 0.562795% CI: [-7.1, 13.9]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 1, Grade M and improved responsep-value: 0.004295% CI: [0, 8]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 1, Grade M and not improved responsep-value: 0.645295% CI: [-9.4, 6.4]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 2, Grade N and improved responsep-value: 0.037695% CI: [0, 17.8]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 2, Grade N and not improved responsep-value: 0.1695% CI: [-35.7, 3.6]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 2, Grade M and improved responsep-value: 0.103295% CI: [0, 10.7]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 2, Grade M and not improved responsep-value: 0.261395% CI: [-14.3, 0.2]Wilcoxon Rank-Sum Test
Secondary

Severity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)

Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. The mean severity of heartburn was calculated in each subgroup (response; Grade N and improved, response; Grade N and not improved, response; Grade M and improved, response; Grade M and not improved) according to criteria 1 and 2. The modified LA classification Grade N indicates the participants with normal mucosa and Grade M indicates the participants with minimal changes to the mucosa.

Time frame: Up to Week 4

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEDIAN)
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade M and Not Improved1.430 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade N and Improved1.000 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade N and Not Improved1.460 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade M and Improved0.890 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade M and Not Improved1.645 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade N and Improved0.510 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade N and Not Improved1.375 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade M and Improved0.420 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade M and Improved0.280 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade M and Not Improved1.520 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade M and Not Improved1.790 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade N and Improved0.640 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade N and Not Improved1.240 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade N and Not Improved1.695 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 1, Grade N and Improved0.430 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Both the Response at Week 2 and the Endoscopic Findings (the Modified LA Classification Grade N or M)Criteria 2, Grade M and Improved0.710 score on a scale
Comparison: Statistical analysis for Criteria 1, Grade N and improved responsep-value: 0.784595% CI: [-0.23, 0.16]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 1, Grade N and not improved responsep-value: 0.445695% CI: [-0.33, 0.17]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 1, Grade M and improved responsep-value: 0.0295% CI: [-0.29, -0.02]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 1, Grade M and not improved responsep-value: 0.467395% CI: [-0.1, 0.22]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 2, Grade N and improved responsep-value: 0.009595% CI: [-0.53, -0.07]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 2, Grade N and not improved responsep-value: 0.16595% CI: [-0.16, 0.71]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 2, Grade M and improved responsep-value: 0.247595% CI: [-0.24, 0.07]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Criteria 2, Grade M and not improvedp-value: 0.236795% CI: [-0.09, 0.32]Wilcoxon Rank-Sum Test
Secondary

Severity of Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at Baseline

Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom:0, No hindrance to daily activities:1\], With symptom \[Mild:2, Moderate:3, Severe:4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. The severity of heartburn was calculated in each subgroup of the endoscopic findings where Grade N: normal mucosa; Grade M: minimal changes to the mucosa, such as erythema and/or whitish turbidity; Grade A: non-confluent mucosal breaks \<5mm in length; Grade B: non-confluent mucosal breaks ≥5mm in length; Grade C: confluent mucosal breaks \<75% circumferential; Grade D: confluent mucosal breaks \>75% circumferential.

Time frame: Up to Week 4

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who had endoscopic findings.

ArmMeasureGroupValue (MEDIAN)
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at BaselineGrade M1.180 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at BaselineGrade N1.070 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at BaselineGrade N0.850 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Endoscopic Findings (the Modified LA Classification Grade N or M) at BaselineGrade M1.110 score on a scale
Comparison: Statistical analysis for Grade N of endoscopic findingsp-value: 0.075795% CI: [-0.43, 0.02]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for Grade M of endoscopic findingsp-value: 0.383795% CI: [-0.22, 0.09]Wilcoxon Rank-Sum Test
Secondary

Severity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2

Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, the higher scores indicates greater severity. The severity was calculated in each subgroup of response (improved or not improved) according to Criteria 1, i.e. Improved: participants experienced heartburn on less than 2 days of the 7 days prior to Week 2 \[Day 8 through Day 14\]; Not improved: participants experienced heartburn on 2 days or more of the 7 days prior to Week 2 \[Day 8 through Day 14\] and Criteria 2, i.e. Improved: proportion of days the participants experienced heartburn during the treatment period up to Week 2 \[Day 14\] was lower than that during the run-in period; Not improved: proportion of days the participants experienced heartburn during the treatment period up to Week 2 \[Day 14\] was equal to or larger than that during the run-in period.

Time frame: Up to Week 4

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable at each category.

ArmMeasureGroupValue (MEDIAN)
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 1, Improved0.420 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 1, Not Improved1.430 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 2, Improved0.960 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 2, Not Improved1.610 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 2, Not Improved1.740 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 1, Improved0.310 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 2, Improved0.675 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) at Week 2Criteria 1, Not Improved1.420 score on a scale
Comparison: Statistical analysis for criteria 1, improved responsep-value: 0.050595% CI: [-0.21, 0]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for criteria 1, not improved responsep-value: 0.813895% CI: [-0.12, 0.15]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for criteria 2, improved responsep-value: 0.012995% CI: [-0.28, -0.03]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for criteria 2, not improved responsep-value: 0.076595% CI: [-0.01, 0.36]Wilcoxon Rank-Sum Test
Secondary

Severity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication History

Heartburn symptoms were collected by participant diaries. Participants recorded the presence and severity (Without symptom \[No symptom: 0, No hindrance to daily activities: 1\], With symptom \[Mild: 2, Moderate: 3, Severe: 4\]) of heartburn in a daily participant diary. The score range was 0-4, with the higher scores reflecting the greater severity. The mean severity of heartburn was calculated in each subgroup of the response (improved or not improved) in the participants who had a medication history of any of acid suppressants. The acid suppressants include proton pump inhibitors \[PPIs\], histamine H2-receptor antagonists \[H2RAs\], or other agents \[anticholinergics or anti-gastrin drugs\].

Time frame: Up to Week 4

Population: FAS included participants who were randomized and received at least one dose of the study drug. Number analyzed is the number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEDIAN)
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryImproved1.150 score on a scale
PlaceboSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryNot Improved1.280 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryImproved1.040 score on a scale
TAK-438 10 mgSeverity of Symptoms of Heartburn in Subgroup Stratified by Response (Improved or Not Improved) to Acid Suppressants in Participants Who Had a Medication HistoryNot Improved1.030 score on a scale
Comparison: Statistical analysis for improved responsep-value: 0.148895% CI: [-0.42, 0.04]Wilcoxon Rank-Sum Test
Comparison: Statistical analysis for not improved responsep-value: 0.377895% CI: [-1.57, 0.69]Wilcoxon Rank-Sum Test

Source: ClinicalTrials.gov · Data processed: Feb 20, 2026