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Global Study to Evaluate the Long-Term Safety and Efficacy of Elagolix in Women With Moderate to Severe Endometriosis-associated Pain

Extension Study to Evaluate the Long-Term Safety and Efficacy of Elagolix in Subjects With Moderate to Severe Endometriosis-Associated Pain

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02143713
Enrollment
496
Registered
2014-05-21
Start date
2014-05-27
Completion date
2017-05-23
Last updated
2021-07-13

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

Conditions

Endometriosis

Keywords

Endometriosis-associated pain, Elagolix, Gonadotropin-releasing Hormone Antagonist, Dysmenorrhea (DYS), Non-menstrual Pelvic Pain (NMPP), Dyspareunia

Brief summary

A randomized study evaluating the continued safety and efficacy of elagolix in the management of moderate to severe endometriosis associated pain in adult pre-menopausal women who completed 6 months treatment in pivotal Study M12-671 (NCT01931670).

Detailed description

The study consists of 2 periods: a 6 month Treatment Period and a post treatment follow-up period of up to 12 months. Participants who received elagolix in the pivotal study who met all entry criteria continued to receive the same dose, either elagolix 150 mg once daily (QD) or elagolix 200 mg twice daily (BID) for up to an additional 6 months in this extension study; participants who received placebo in the pivotal study were randomized in a 1:1 ratio to receive either elagolix 150 mg QD or elagolix 200 mg BID for up to 6 months. An electronic diary will be used to collect endometriosis-associated pain, uterine bleeding, and analgesic medication use for endometriosis associated pain on a daily basis.

Interventions

DRUGElagolix

Elagolix tablets administered orally

Sponsors

AbbVie
Lead SponsorINDUSTRY

Study design

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

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 50 Years
Healthy volunteers
No

Inclusion criteria

* Subject has completed the 6-Month Treatment Period in pivotal study M12-671. * Agrees to use required birth control methods during the study through Month 6 of the Post-treatment Follow-up period

Exclusion criteria

* Clinically significant gynecological condition * Bone mineral density (BMD) loss greater than or equal to 8 percent in the spine, femoral neck or total hip * Plans to become pregnant in the next 18 months

Design outcomes

Primary

MeasureTime frameDescription
Percentage of Participants With a Response for Dysmenorrhea at Month 6 Based on Daily AssessmentBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and Month 6Response was defined as a reduction of -0.85 or more from baseline in dysmenorrhea (pain during menstruation) as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average rescue analgesic pill count and no additional analgesic). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-671. Participants recorded rescue analgesic use for endometriosis-associated pain daily and dysmenorrhea and its impact on daily activities each day of their period in an electronic diary (e-Diary). Dysmenorrhea was assessed according to the following: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Analgesic use and pain scores were averaged over the 35 days prior to each visit.
Percentage of Participants With a Response for Non-menstrual Pelvic Pain at Month 6 Based on Daily AssessmentBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and Month 6Response was defined as a reduction of -0.43 or greater from baseline for non-menstrual pelvic pain as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average pill count of rescue analgesics and no additional analgesics). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-671. Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed non-menstrual pelvic pain and its impact on their daily activities each day in an e-Diary according to the following response options: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores and analgesic use were averaged over the 35 days prior to each visit.

Secondary

MeasureTime frameDescription
Percentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, and 5Response was defined as a reduction of -0.43 or greater from baseline for non-menstrual pelvic pain as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average pill count of rescue analgesics and no additional analgesics). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-671. Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed non-menstrual pelvic pain and its impact on their daily activities each day in an e-Diary according to the following response options: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores and analgesic use were averaged over the 35 days prior to each visit.
Percentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6Response was defined as a reduction of -0.29 or more from baseline in dyspareunia (pain during sexual intercourse) as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average rescue analgesic pill count and no additional analgesics). Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed dyspareunia each day in an e-Diary. Dyspareunia was assessed according to the following: * 0: None; No discomfort during sexual intercourse * 1: Mild; Able to tolerate the discomfort during sexual intercourse * 2: Moderate; Intercourse was interrupted due to pain * 3: Severe; Avoided intercourse because of pain * Not applicable; I was not sexually active for reasons other than endometriosis or did not have sexual intercourse. Pain scores and analgesic use were averaged over the 35 days prior to each visit. Responses of Not Applicable were excluded.
Percent Change From Baseline in Dysmenorrhea Based on Daily AssessmentBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6Participants assessed dysmenorrhea (pain during menstruation) and its impact on their daily activities each day of their period in an e-Diary according to the following response options: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores were averaged over the 35 days prior to each visit.
Percent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6Participants assessed non-menstrual pelvic pain and its impact on their daily activities each day in an e-Diary according to the following response options: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores were averaged over the 35 days prior to each visit.
Percent Change From Baseline in Dyspareunia Based on Daily AssessmentBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6Participants assessed dyspareunia each day in an e-Diary according to the following response options: * 0: None; No discomfort during sexual intercourse * 1: Mild; Able to tolerate the discomfort during sexual intercourse * 2: Moderate; Intercourse was interrupted due to pain * 3: Severe; Avoided intercourse because of pain * Not applicable; I was not sexually active for reasons other than endometriosis or did not have sexual intercourse. Pain scores were averaged over the 35 days prior to each visit. Responses of Not Applicable were excluded.
Change From Baseline in Any Rescue Analgesic UseBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6Permitted rescue analgesics varied by country and were limited to non-steroidal anti-inflammatory drugs (NSAID) (naproxen 500 mg), or opioid analgesics (hydrocodone 5 mg + acetaminophen 300 mg or 325 mg, or codeine 30 mg + acetaminophen 300 mg, or codeine 30 mg, or tramadol 37.5 mg + acetaminophen 325 mg). Use of rescue analgesic medications taken for endometriosis-associated pain was recorded by the participant daily in the e-Diary as the total number of pills/tablets of each type taken within a 24-hour period. Any rescue analgesic use (NSAID and/or opioid) was calculated as the total number of pills divided by the number of days in the window (i.e. average daily pill count) over the 35-day window prior to and including the reference study day.
Change From Baseline in NSAID Rescue Analgesic UseBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6Permitted rescue analgesics varied by country and were limited to non-steroidal anti-inflammatory drugs (NSAID) (naproxen 500 mg), or opioid analgesics (hydrocodone 5 mg + acetaminophen 300 mg or 325 mg, or codeine 30 mg + acetaminophen 300 mg, or codeine 30 mg, or tramadol 37.5 mg + acetaminophen 325 mg). Use of rescue analgesic medications taken for endometriosis-associated pain was recorded by the participant daily in the e-Diary as the total number of pills/tablets of each type taken within a 24-hour period. NSAID rescue analgesic use was calculated as the total number of NSAID pills divided by the number of days in the window (i.e. average daily pill count) over the 35-day window prior to and including the reference study day.
Number of Days in Hospital During the Treatment Period6 monthsThe Health Resource Use Questionnaire (HRUQ) was used to collect information on non-study-related health visits that participants had during the study, including physician visits, hospitalizations and types of procedures received.
Percent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6The NRS measured endometriosis-associated pain with and without menstruation on an 11-point scale from 0 = no pain to 10 = worst pain ever. Participants were asked to assess their endometriosis pain over the past 24 hours at it's worst at approximately the same time every day in the e-Diary. Pain scores were averaged over the 35 days prior to each visit.
Percentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonths 1, 2, 3, 4, 5, and 6The Patient Global Impression of Change (PGIC) is a questionnaire-based assessment of the change in endometriosis pain since the initiation of study drug. The participant was asked to select from one of seven response categories: 1. Very Much Improved 2. Much Improved 3. Minimally Improved 4. Not Changed 5. Minimally Worse 6. Much Worse 7. Very Much Worse
Change From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 3, and 6The EHP-30 is an instrument to measure health-related quality of life in women with endometriosis. The EHP-30 consists of two parts: a core questionnaire containing 5 scales that are applicable to all women with endometriosis and includes pain, control and powerlessness, emotional well-being, social support, and self-image, and a modular part containing 6 scales which do not necessarily apply to all women with endometriosis. Each question in the core questionnaire is scored on the following scale: 0 = Never, 1 = Rarely, 2 = Sometimes, 3 = Often, 4 = Always. The pain dimension consists of 11 questions. The dimension score ranges from 0 to 100, where 0 = best possible health status as measured by the questionnaire; 100 = worst possible health status. A negative change from baseline score indicates improvement in quality of life.
Change From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 3, and 6The EHP-30 is an instrument to measure health-related quality of life in women with endometriosis. The EHP-30 consists of two parts: a core questionnaire containing 5 scales that are applicable to all women with endometriosis and a modular part containing 6 scales which do not necessarily apply to all women with endometriosis; only 1 modular questionnaire (sexual intercourse \[5 items\]) was used in this study. The Sexual Intercourse dimension consists of 5 questions, each answered on the following scale: 0 = Never, 1 = Rarely, 2 = Sometimes, 3 = Often, 4 = Always, or Not Applicable (not scored). The dimension score ranges from 0 to 100, where 0 = best possible health status as measured by the questionnaire; 100 = worst possible health status. A negative change from baseline score indicates improvement in quality of life.
Change From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and Month 6The HRPQ consists of 9 questions measuring the impact of endometriosis-associated pain and its treatment on work productivity and daily activities in the home. Absenteeism: Number of hours of intended work lost due to illness or treatment. Presenteeism: Number of hours of work where output was impacted by illness or treatments. Total hours lost is the sum of hours missed due to absenteeism plus presenteeism.
Number of Participants With Non-study Health Visits During the Treatment Period6 monthsThe Health Resource Use Questionnaire (HRUQ) was used to collect information on non-study-related health visits that participants had during the study.
Change From Baseline in Opioid Rescue Analgesic UseBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6Permitted rescue analgesics varied by country and were limited to non-steroidal anti-inflammatory drugs (NSAID) (naproxen 500 mg), or opioid analgesics (hydrocodone 5 mg + acetaminophen 300 mg or 325 mg, or codeine 30 mg + acetaminophen 300 mg, or codeine 30 mg, or tramadol 37.5 mg + acetaminophen 325 mg). Use of rescue analgesic medications taken for endometriosis-associated pain was recorded by the participant daily in the e-Diary as the total number of pills/tablets of each type taken within a 24-hour period. Opioid rescue analgesic use was calculated as the total number of opioid pills divided by the number of days in the window (i.e. average daily pill count) over the 35-day window prior to and including the reference study day.
Percentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentBaseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, and 5Response was defined as a reduction of -0.85 or more from baseline in dysmenorrhea (pain during menstruation) as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average rescue analgesic pill count and no additional analgesic). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-671. Participants recorded rescue analgesic use for endometriosis-associated pain daily and dysmenorrhea and its impact on daily activities each day of their period in an electronic diary (e-Diary). Dysmenorrhea was assessed according to the following: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Analgesic use and pain scores were averaged over the 35 days prior to each visit.

Participant flow

Recruitment details

Participants who completed the 6-month Treatment Period in the pivotal Study M12-671 (NCT01931670) could enter this extension study. A total of 96 participants were enrolled at 148 sites in North and South America, Europe, Australia/New Zealand, and South Africa. One enrolled patient did not receive study drug and is not included in these results.

Pre-assignment details

The study consisted of a 6-month Treatment Period and a Post-treatment Follow-up (PTFU) of up to 12 months. Participants who received elagolix in the pivotal study continued to receive the same dose for a further 6 months; participants on placebo in the pivotal study were randomized 1:1 to either elagolix 150 mg once daily or 200 mg twice daily.

Participants by arm

ArmCount
Placebo/Elagolix 150 mg QD
Participants who received placebo in pivotal Study M12-671 and were randomized to elagolix 150 mg QD for 6 months in this extension Study M12-821.
102
Placebo Elagolix 200 mg BID
Participants who received placebo in pivotal Study M12-671 and were randomized to elagolix 200 mg BID for 6 months in this extension Study M12-821.
111
Elagolix/Elagolix 150 mg QD
Participants were randomized to elagolix 150 mg QD in pivotal Study M12-671 and continued to receive elagolix 150 mg QD for 6 months in this extension Study M12-821.
142
Elagolix/Elagolix 200 mg BID
Participants were randomized to elagolix 200 mg BID in pivotal Study M12-671 and continued to receive elagolix 200 mg BID for 6 months in this extension Study M12-821.
140
Total495

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003
Post-treatment Follow-up (12 Months)Adverse Event0010
Post-treatment Follow-up (12 Months)Exclusionary Medication0101
Post-treatment Follow-up (12 Months)Lost to Follow-up38118
Post-treatment Follow-up (12 Months)Other3477
Post-treatment Follow-up (12 Months)Surgery or Invasive Intervention2441
Post-treatment Follow-up (12 Months)Withdrawal by Subject47610
Treatment Period (6 Months)Adverse Event7889
Treatment Period (6 Months)Bone Mineral Density (BMD) Decrease0004
Treatment Period (6 Months)Exclusionary Medication2000
Treatment Period (6 Months)Lack of Efficacy1001
Treatment Period (6 Months)Lost to Follow-up3043
Treatment Period (6 Months)Non-compliance1003
Treatment Period (6 Months)Other3032
Treatment Period (6 Months)Pregnancy0220
Treatment Period (6 Months)Surgery or Invasive Intervention2002
Treatment Period (6 Months)Withdrawal by Subject1254

Baseline characteristics

CharacteristicPlacebo/Elagolix 150 mg QDPlacebo Elagolix 200 mg BIDElagolix/Elagolix 150 mg QDElagolix/Elagolix 200 mg BIDTotal
Age, Continuous33.5 years
STANDARD_DEVIATION 7
33.2 years
STANDARD_DEVIATION 6.32
33.2 years
STANDARD_DEVIATION 7.02
34.1 years
STANDARD_DEVIATION 6.7
33.5 years
STANDARD_DEVIATION 6.76
Ethnicity (NIH/OMB)
Hispanic or Latino
14 Participants11 Participants15 Participants21 Participants61 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
88 Participants100 Participants127 Participants119 Participants434 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants
Race/Ethnicity, Customized
Asian
0 Participants1 Participants1 Participants1 Participants3 Participants
Race/Ethnicity, Customized
Black or African American
7 Participants9 Participants14 Participants12 Participants42 Participants
Race/Ethnicity, Customized
Multi race
0 Participants1 Participants0 Participants1 Participants2 Participants
Race/Ethnicity, Customized
Native Hawaiian or other pacific islander
1 Participants0 Participants0 Participants0 Participants1 Participants
Race/Ethnicity, Customized
White
94 Participants100 Participants127 Participants126 Participants447 Participants
Sex: Female, Male
Female
102 Participants111 Participants142 Participants140 Participants495 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants0 Participants0 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
0 / 1020 / 1110 / 1420 / 140
other
Total, other adverse events
49 / 10274 / 11165 / 14270 / 140
serious
Total, serious adverse events
4 / 1028 / 1117 / 1428 / 140

Outcome results

Primary

Percentage of Participants With a Response for Dysmenorrhea at Month 6 Based on Daily Assessment

Response was defined as a reduction of -0.85 or more from baseline in dysmenorrhea (pain during menstruation) as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average rescue analgesic pill count and no additional analgesic). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-671. Participants recorded rescue analgesic use for endometriosis-associated pain daily and dysmenorrhea and its impact on daily activities each day of their period in an electronic diary (e-Diary). Dysmenorrhea was assessed according to the following: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Analgesic use and pain scores were averaged over the 35 days prior to each visit.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and Month 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study with available baseline and month 6 data.

ArmMeasureValue (NUMBER)
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Month 6 Based on Daily Assessment37.0 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Month 6 Based on Daily Assessment57.1 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Month 6 Based on Daily Assessment50.8 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Month 6 Based on Daily Assessment75.9 percentage of participants
Primary

Percentage of Participants With a Response for Non-menstrual Pelvic Pain at Month 6 Based on Daily Assessment

Response was defined as a reduction of -0.43 or greater from baseline for non-menstrual pelvic pain as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average pill count of rescue analgesics and no additional analgesics). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-671. Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed non-menstrual pelvic pain and its impact on their daily activities each day in an e-Diary according to the following response options: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores and analgesic use were averaged over the 35 days prior to each visit.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and Month 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study with available baseline and month 6 data.

ArmMeasureValue (NUMBER)
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Month 6 Based on Daily Assessment27.2 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Month 6 Based on Daily Assessment32.7 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Month 6 Based on Daily Assessment66.4 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Month 6 Based on Daily Assessment67.2 percentage of participants
Secondary

Change From Baseline in Any Rescue Analgesic Use

Permitted rescue analgesics varied by country and were limited to non-steroidal anti-inflammatory drugs (NSAID) (naproxen 500 mg), or opioid analgesics (hydrocodone 5 mg + acetaminophen 300 mg or 325 mg, or codeine 30 mg + acetaminophen 300 mg, or codeine 30 mg, or tramadol 37.5 mg + acetaminophen 325 mg). Use of rescue analgesic medications taken for endometriosis-associated pain was recorded by the participant daily in the e-Diary as the total number of pills/tablets of each type taken within a 24-hour period. Any rescue analgesic use (NSAID and/or opioid) was calculated as the total number of pills divided by the number of days in the window (i.e. average daily pill count) over the 35-day window prior to and including the reference study day.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study with available baseline data and data at each time point.

ArmMeasureGroupValue (MEAN)Dispersion
Placebo/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 4-0.13 pills/dayStandard Deviation 0.46
Placebo/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 3-0.14 pills/dayStandard Deviation 0.391
Placebo/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 6-0.16 pills/dayStandard Deviation 0.41
Placebo/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 5-0.16 pills/dayStandard Deviation 0.446
Placebo/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 2-0.16 pills/dayStandard Deviation 0.375
Placebo/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 1-0.07 pills/dayStandard Deviation 0.32
Placebo/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 1-0.16 pills/dayStandard Deviation 0.389
Placebo/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 2-0.24 pills/dayStandard Deviation 0.51
Placebo/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 3-0.24 pills/dayStandard Deviation 0.524
Placebo/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 4-0.28 pills/dayStandard Deviation 0.483
Placebo/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 5-0.29 pills/dayStandard Deviation 0.539
Placebo/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 6-0.28 pills/dayStandard Deviation 0.513
Elagolix/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 2-0.49 pills/dayStandard Deviation 0.829
Elagolix/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 4-0.48 pills/dayStandard Deviation 0.815
Elagolix/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 6-0.45 pills/dayStandard Deviation 0.834
Elagolix/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 5-0.46 pills/dayStandard Deviation 0.817
Elagolix/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 3-0.46 pills/dayStandard Deviation 0.806
Elagolix/Elagolix 150 mg QDChange From Baseline in Any Rescue Analgesic UseMonth 1-0.44 pills/dayStandard Deviation 0.745
Elagolix/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 2-0.52 pills/dayStandard Deviation 0.774
Elagolix/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 6-0.59 pills/dayStandard Deviation 0.799
Elagolix/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 5-0.57 pills/dayStandard Deviation 0.758
Elagolix/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 4-0.54 pills/dayStandard Deviation 0.811
Elagolix/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 1-0.47 pills/dayStandard Deviation 0.711
Elagolix/Elagolix 200 mg BIDChange From Baseline in Any Rescue Analgesic UseMonth 3-0.53 pills/dayStandard Deviation 0.774
Secondary

Change From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain Dimension

The EHP-30 is an instrument to measure health-related quality of life in women with endometriosis. The EHP-30 consists of two parts: a core questionnaire containing 5 scales that are applicable to all women with endometriosis and includes pain, control and powerlessness, emotional well-being, social support, and self-image, and a modular part containing 6 scales which do not necessarily apply to all women with endometriosis. Each question in the core questionnaire is scored on the following scale: 0 = Never, 1 = Rarely, 2 = Sometimes, 3 = Often, 4 = Always. The pain dimension consists of 11 questions. The dimension score ranges from 0 to 100, where 0 = best possible health status as measured by the questionnaire; 100 = worst possible health status. A negative change from baseline score indicates improvement in quality of life.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 3, and 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study with available baseline data and data at each time point.

ArmMeasureGroupValue (MEAN)Dispersion
Placebo/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 1-8.02 units on a scaleStandard Deviation 17.828
Placebo/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 6-10.60 units on a scaleStandard Deviation 20.827
Placebo/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 3-11.12 units on a scaleStandard Deviation 22.424
Placebo/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 1-12.18 units on a scaleStandard Deviation 17.465
Placebo/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 6-15.61 units on a scaleStandard Deviation 21.047
Placebo/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 3-15.25 units on a scaleStandard Deviation 21.467
Elagolix/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 3-32.00 units on a scaleStandard Deviation 23.172
Elagolix/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 1-32.25 units on a scaleStandard Deviation 21.235
Elagolix/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 6-32.95 units on a scaleStandard Deviation 23.674
Elagolix/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 1-36.45 units on a scaleStandard Deviation 22.32
Elagolix/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 6-38.48 units on a scaleStandard Deviation 21.924
Elagolix/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Pain DimensionMonth 3-37.42 units on a scaleStandard Deviation 21.492
Secondary

Change From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse Dimension

The EHP-30 is an instrument to measure health-related quality of life in women with endometriosis. The EHP-30 consists of two parts: a core questionnaire containing 5 scales that are applicable to all women with endometriosis and a modular part containing 6 scales which do not necessarily apply to all women with endometriosis; only 1 modular questionnaire (sexual intercourse \[5 items\]) was used in this study. The Sexual Intercourse dimension consists of 5 questions, each answered on the following scale: 0 = Never, 1 = Rarely, 2 = Sometimes, 3 = Often, 4 = Always, or Not Applicable (not scored). The dimension score ranges from 0 to 100, where 0 = best possible health status as measured by the questionnaire; 100 = worst possible health status. A negative change from baseline score indicates improvement in quality of life.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 3, and 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study with available baseline data and data at each time point.

ArmMeasureGroupValue (MEAN)Dispersion
Placebo/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 1-3.29 units on a scaleStandard Deviation 13.655
Placebo/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 6-9.36 units on a scaleStandard Deviation 19.294
Placebo/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 3-9.26 units on a scaleStandard Deviation 20.264
Placebo/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 1-10.35 units on a scaleStandard Deviation 16.846
Placebo/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 6-7.30 units on a scaleStandard Deviation 22.963
Placebo/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 3-12.50 units on a scaleStandard Deviation 22.449
Elagolix/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 3-24.61 units on a scaleStandard Deviation 26.986
Elagolix/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 1-24.17 units on a scaleStandard Deviation 26.01
Elagolix/Elagolix 150 mg QDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 6-23.21 units on a scaleStandard Deviation 26.31
Elagolix/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 1-28.37 units on a scaleStandard Deviation 29.886
Elagolix/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 6-33.21 units on a scaleStandard Deviation 31.988
Elagolix/Elagolix 200 mg BIDChange From Baseline in Endometriosis Health Profile-30 (EHP-30) Sexual Intercourse DimensionMonth 3-28.66 units on a scaleStandard Deviation 31.58
Secondary

Change From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and Household

The HRPQ consists of 9 questions measuring the impact of endometriosis-associated pain and its treatment on work productivity and daily activities in the home. Absenteeism: Number of hours of intended work lost due to illness or treatment. Presenteeism: Number of hours of work where output was impacted by illness or treatments. Total hours lost is the sum of hours missed due to absenteeism plus presenteeism.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and Month 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study with available baseline data and data at each time point. Hours lost from workplace were only calculated for participants who were employed.

ArmMeasureGroupValue (MEAN)Dispersion
Placebo/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdAbsenteeism from workplace-2.82 hoursStandard Deviation 5.648
Placebo/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdPresenteeism from workplace-10.31 hoursStandard Deviation 15.902
Placebo/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdTotal hours of work lost from workplace-13.22 hoursStandard Deviation 16.663
Placebo/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdAbsenteeism from household-3.17 hoursStandard Deviation 6.241
Placebo/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdPresenteeism from household-2.47 hoursStandard Deviation 6.581
Placebo/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdTotal hours of work lost from household-5.64 hoursStandard Deviation 9.919
Placebo/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdTotal hours of work lost from household-4.86 hoursStandard Deviation 7.185
Placebo/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdAbsenteeism from household-2.68 hoursStandard Deviation 3.779
Placebo/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdAbsenteeism from workplace-1.33 hoursStandard Deviation 8.945
Placebo/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdTotal hours of work lost from workplace-9.70 hoursStandard Deviation 13.683
Placebo/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdPresenteeism from workplace-8.37 hoursStandard Deviation 9.675
Placebo/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdPresenteeism from household-2.19 hoursStandard Deviation 4.973
Elagolix/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdPresenteeism from workplace-8.38 hoursStandard Deviation 12.489
Elagolix/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdTotal hours of work lost from workplace-9.36 hoursStandard Deviation 13.365
Elagolix/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdAbsenteeism from household-3.56 hoursStandard Deviation 4.924
Elagolix/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdTotal hours of work lost from household-5.84 hoursStandard Deviation 7.844
Elagolix/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdPresenteeism from household-2.33 hoursStandard Deviation 5.182
Elagolix/Elagolix 150 mg QDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdAbsenteeism from workplace-1.25 hoursStandard Deviation 4.377
Elagolix/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdPresenteeism from household-2.74 hoursStandard Deviation 5.308
Elagolix/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdTotal hours of work lost from household-6.17 hoursStandard Deviation 7.93
Elagolix/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdPresenteeism from workplace-10.63 hoursStandard Deviation 9.837
Elagolix/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdAbsenteeism from household-3.50 hoursStandard Deviation 4.18
Elagolix/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdAbsenteeism from workplace-1.73 hoursStandard Deviation 4.133
Elagolix/Elagolix 200 mg BIDChange From Baseline in Health-Related Productivity Questionnaire (HRPQ): Hours of Work Lost in Workplace and HouseholdTotal hours of work lost from workplace-12.02 hoursStandard Deviation 10.447
Secondary

Change From Baseline in NSAID Rescue Analgesic Use

Permitted rescue analgesics varied by country and were limited to non-steroidal anti-inflammatory drugs (NSAID) (naproxen 500 mg), or opioid analgesics (hydrocodone 5 mg + acetaminophen 300 mg or 325 mg, or codeine 30 mg + acetaminophen 300 mg, or codeine 30 mg, or tramadol 37.5 mg + acetaminophen 325 mg). Use of rescue analgesic medications taken for endometriosis-associated pain was recorded by the participant daily in the e-Diary as the total number of pills/tablets of each type taken within a 24-hour period. NSAID rescue analgesic use was calculated as the total number of NSAID pills divided by the number of days in the window (i.e. average daily pill count) over the 35-day window prior to and including the reference study day.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study with available baseline data and data at each time point.

ArmMeasureGroupValue (MEAN)Dispersion
Placebo/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 1-0.05 pills/dayStandard Deviation 0.209
Placebo/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 2-0.10 pills/dayStandard Deviation 0.271
Placebo/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 3-0.11 pills/dayStandard Deviation 0.281
Placebo/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 4-0.09 pills/dayStandard Deviation 0.297
Placebo/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 5-0.11 pills/dayStandard Deviation 0.316
Placebo/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 6-0.10 pills/dayStandard Deviation 0.241
Placebo/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 6-0.20 pills/dayStandard Deviation 0.369
Placebo/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 4-0.20 pills/dayStandard Deviation 0.334
Placebo/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 1-0.12 pills/dayStandard Deviation 0.263
Placebo/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 3-0.18 pills/dayStandard Deviation 0.336
Placebo/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 2-0.18 pills/dayStandard Deviation 0.343
Placebo/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 5-0.21 pills/dayStandard Deviation 0.353
Elagolix/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 2-0.29 pills/dayStandard Deviation 0.624
Elagolix/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 3-0.27 pills/dayStandard Deviation 0.55
Elagolix/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 4-0.28 pills/dayStandard Deviation 0.531
Elagolix/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 6-0.26 pills/dayStandard Deviation 0.569
Elagolix/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 5-0.27 pills/dayStandard Deviation 0.556
Elagolix/Elagolix 150 mg QDChange From Baseline in NSAID Rescue Analgesic UseMonth 1-0.25 pills/dayStandard Deviation 0.59
Elagolix/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 5-0.31 pills/dayStandard Deviation 0.376
Elagolix/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 6-0.32 pills/dayStandard Deviation 0.38
Elagolix/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 2-0.29 pills/dayStandard Deviation 0.389
Elagolix/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 4-0.30 pills/dayStandard Deviation 0.379
Elagolix/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 1-0.28 pills/dayStandard Deviation 0.363
Elagolix/Elagolix 200 mg BIDChange From Baseline in NSAID Rescue Analgesic UseMonth 3-0.30 pills/dayStandard Deviation 0.37
Secondary

Change From Baseline in Opioid Rescue Analgesic Use

Permitted rescue analgesics varied by country and were limited to non-steroidal anti-inflammatory drugs (NSAID) (naproxen 500 mg), or opioid analgesics (hydrocodone 5 mg + acetaminophen 300 mg or 325 mg, or codeine 30 mg + acetaminophen 300 mg, or codeine 30 mg, or tramadol 37.5 mg + acetaminophen 325 mg). Use of rescue analgesic medications taken for endometriosis-associated pain was recorded by the participant daily in the e-Diary as the total number of pills/tablets of each type taken within a 24-hour period. Opioid rescue analgesic use was calculated as the total number of opioid pills divided by the number of days in the window (i.e. average daily pill count) over the 35-day window prior to and including the reference study day.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study with available baseline data and data at each time point.

ArmMeasureGroupValue (MEAN)Dispersion
Placebo/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 2-0.06 pills/dayStandard Deviation 0.214
Placebo/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 5-0.05 pills/dayStandard Deviation 0.227
Placebo/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 1-0.02 pills/dayStandard Deviation 0.197
Placebo/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 4-0.05 pills/dayStandard Deviation 0.262
Placebo/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 3-0.04 pills/dayStandard Deviation 0.217
Placebo/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 6-0.06 pills/dayStandard Deviation 0.237
Placebo/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 3-0.06 pills/dayStandard Deviation 0.309
Placebo/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 4-0.08 pills/dayStandard Deviation 0.231
Placebo/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 6-0.07 pills/dayStandard Deviation 0.271
Placebo/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 2-0.06 pills/dayStandard Deviation 0.27
Placebo/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 5-0.08 pills/dayStandard Deviation 0.273
Placebo/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 1-0.04 pills/dayStandard Deviation 0.243
Elagolix/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 3-0.19 pills/dayStandard Deviation 0.613
Elagolix/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 1-0.19 pills/dayStandard Deviation 0.526
Elagolix/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 2-0.19 pills/dayStandard Deviation 0.573
Elagolix/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 6-0.20 pills/dayStandard Deviation 0.623
Elagolix/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 4-0.20 pills/dayStandard Deviation 0.62
Elagolix/Elagolix 150 mg QDChange From Baseline in Opioid Rescue Analgesic UseMonth 5-0.19 pills/dayStandard Deviation 0.613
Elagolix/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 3-0.23 pills/dayStandard Deviation 0.662
Elagolix/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 2-0.23 pills/dayStandard Deviation 0.655
Elagolix/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 6-0.27 pills/dayStandard Deviation 0.68
Elagolix/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 5-0.26 pills/dayStandard Deviation 0.643
Elagolix/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 1-0.20 pills/dayStandard Deviation 0.596
Elagolix/Elagolix 200 mg BIDChange From Baseline in Opioid Rescue Analgesic UseMonth 4-0.24 pills/dayStandard Deviation 0.693
Secondary

Number of Days in Hospital During the Treatment Period

The Health Resource Use Questionnaire (HRUQ) was used to collect information on non-study-related health visits that participants had during the study, including physician visits, hospitalizations and types of procedures received.

Time frame: 6 months

Population: Participants who received at least 1 dose of double-blind study drug in this extension study and who underwent hospitalization

ArmMeasureValue (MEDIAN)
Placebo/Elagolix 150 mg QDNumber of Days in Hospital During the Treatment Period2.0 days
Placebo/Elagolix 200 mg BIDNumber of Days in Hospital During the Treatment Period4.0 days
Elagolix/Elagolix 150 mg QDNumber of Days in Hospital During the Treatment Period3.0 days
Elagolix/Elagolix 200 mg BIDNumber of Days in Hospital During the Treatment Period3.0 days
Secondary

Number of Participants With Non-study Health Visits During the Treatment Period

The Health Resource Use Questionnaire (HRUQ) was used to collect information on non-study-related health visits that participants had during the study.

Time frame: 6 months

Population: Participants who received at least 1 dose of double-blind study drug in this extension study

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Placebo/Elagolix 150 mg QDNumber of Participants With Non-study Health Visits During the Treatment Period48 Participants
Placebo/Elagolix 200 mg BIDNumber of Participants With Non-study Health Visits During the Treatment Period65 Participants
Elagolix/Elagolix 150 mg QDNumber of Participants With Non-study Health Visits During the Treatment Period76 Participants
Elagolix/Elagolix 200 mg BIDNumber of Participants With Non-study Health Visits During the Treatment Period76 Participants
Secondary

Percentage of Participants With a PGIC Response of Much Improved or Very Much Improved

The Patient Global Impression of Change (PGIC) is a questionnaire-based assessment of the change in endometriosis pain since the initiation of study drug. The participant was asked to select from one of seven response categories: 1. Very Much Improved 2. Much Improved 3. Minimally Improved 4. Not Changed 5. Minimally Worse 6. Much Worse 7. Very Much Worse

Time frame: Months 1, 2, 3, 4, 5, and 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study and with available data at each time point.

ArmMeasureGroupValue (NUMBER)
Placebo/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 150.0 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 258.7 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 363.6 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 461.4 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 567.1 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 665.8 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 676.3 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 475.2 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 156.8 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 370.9 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 274.5 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 581.0 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 269.1 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 367.9 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 471.1 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 675.4 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 571.8 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 165.7 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 582.1 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 684.0 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 278.9 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 482.1 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 178.3 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a PGIC Response of Much Improved or Very Much ImprovedMonth 377.2 percentage of participants
Secondary

Percentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily Assessment

Response was defined as a reduction of -0.85 or more from baseline in dysmenorrhea (pain during menstruation) as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average rescue analgesic pill count and no additional analgesic). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-671. Participants recorded rescue analgesic use for endometriosis-associated pain daily and dysmenorrhea and its impact on daily activities each day of their period in an electronic diary (e-Diary). Dysmenorrhea was assessed according to the following: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Analgesic use and pain scores were averaged over the 35 days prior to each visit.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, and 5

Population: Participants who received at least 1 dose of double-blind study drug in this extension study and with available data at each time point

ArmMeasureGroupValue (NUMBER)
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 330.0 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 530.9 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 111.8 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 433.0 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 236.5 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 364.1 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 262.3 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 559.0 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 124.5 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 464.7 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 252.2 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 553.2 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 447.7 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 348.1 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 156.7 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 582.9 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 174.3 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 279.1 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 377.1 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dysmenorrhea at Each Month Based on Daily AssessmentMonth 480.0 percentage of participants
Secondary

Percentage of Participants With a Response for Dyspareunia at Each Month Based on Daily Assessment

Response was defined as a reduction of -0.29 or more from baseline in dyspareunia (pain during sexual intercourse) as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average rescue analgesic pill count and no additional analgesics). Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed dyspareunia each day in an e-Diary. Dyspareunia was assessed according to the following: * 0: None; No discomfort during sexual intercourse * 1: Mild; Able to tolerate the discomfort during sexual intercourse * 2: Moderate; Intercourse was interrupted due to pain * 3: Severe; Avoided intercourse because of pain * Not applicable; I was not sexually active for reasons other than endometriosis or did not have sexual intercourse. Pain scores and analgesic use were averaged over the 35 days prior to each visit. Responses of Not Applicable were excluded.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study and with available data at each time point; if a participant's mean score was not defined because all reports in that month were Not Applicable, then that mean score was treated as missing.

ArmMeasureGroupValue (NUMBER)
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 123.1 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 230.6 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 337.3 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 434.8 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 530.0 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 628.8 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 631.3 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 432.3 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 127.3 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 333.3 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 235.1 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 540.0 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 247.0 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 355.7 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 454.1 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 645.9 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 552.3 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 150.5 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 563.5 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 658.1 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 265.3 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 460.2 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 163.4 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Dyspareunia at Each Month Based on Daily AssessmentMonth 361.2 percentage of participants
Secondary

Percentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily Assessment

Response was defined as a reduction of -0.43 or greater from baseline for non-menstrual pelvic pain as well as no increase in rescue analgesic use for endometriosis-associated pain (defined as a \< 15% increase in average pill count of rescue analgesics and no additional analgesics). The response threshold represents a clinically meaningful response that was determined in pivotal Study M12-671. Participants recorded rescue analgesic medication for endometriosis-associated pain and assessed non-menstrual pelvic pain and its impact on their daily activities each day in an e-Diary according to the following response options: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores and analgesic use were averaged over the 35 days prior to each visit.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, and 5

Population: Participants who received at least 1 dose of double-blind study drug in this extension study and with available data at each time point

ArmMeasureGroupValue (NUMBER)
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 427.3 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 220.8 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 528.4 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 318.9 percentage of participants
Placebo/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 112.7 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 329.1 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 434.3 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 533.0 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 227.4 percentage of participants
Placebo/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 118.2 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 366.2 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 161.7 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 261.8 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 464.8 percentage of participants
Elagolix/Elagolix 150 mg QDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 567.5 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 466.4 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 263.4 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 162.1 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 365.6 percentage of participants
Elagolix/Elagolix 200 mg BIDPercentage of Participants With a Response for Non-menstrual Pelvic Pain at Each Month Based on Daily AssessmentMonth 572.6 percentage of participants
Secondary

Percent Change From Baseline in Dysmenorrhea Based on Daily Assessment

Participants assessed dysmenorrhea (pain during menstruation) and its impact on their daily activities each day of their period in an e-Diary according to the following response options: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores were averaged over the 35 days prior to each visit.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study with available baseline data and data at each time point.

ArmMeasureGroupValue (MEAN)Dispersion
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 3-40.2 percent changeStandard Deviation 51.63
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 2-47.6 percent changeStandard Deviation 50.17
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 1-18.4 percent changeStandard Deviation 41.71
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 6-44.6 percent changeStandard Deviation 45.08
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 4-40.3 percent changeStandard Deviation 51.25
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 5-38.0 percent changeStandard Deviation 50.01
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 5-75.6 percent changeStandard Deviation 47.88
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 1-27.0 percent changeStandard Deviation 55.5
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 2-70.2 percent changeStandard Deviation 55.81
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 3-76.7 percent changeStandard Deviation 48.73
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 6-80.7 percent changeStandard Deviation 38.43
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 4-77.5 percent changeStandard Deviation 41.25
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 6-52.9 percent changeStandard Deviation 39.52
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 3-49.0 percent changeStandard Deviation 41.98
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 5-51.8 percent changeStandard Deviation 39.25
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 2-50.7 percent changeStandard Deviation 41.16
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 4-50.5 percent changeStandard Deviation 39.97
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 1-54.6 percent changeStandard Deviation 41.79
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 6-81.8 percent changeStandard Deviation 33.57
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 4-83.0 percent changeStandard Deviation 36.23
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 2-84.0 percent changeStandard Deviation 33.76
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 3-84.8 percent changeStandard Deviation 32.01
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 5-82.7 percent changeStandard Deviation 33.89
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dysmenorrhea Based on Daily AssessmentMonth 1-81.3 percent changeStandard Deviation 36
Secondary

Percent Change From Baseline in Dyspareunia Based on Daily Assessment

Participants assessed dyspareunia each day in an e-Diary according to the following response options: * 0: None; No discomfort during sexual intercourse * 1: Mild; Able to tolerate the discomfort during sexual intercourse * 2: Moderate; Intercourse was interrupted due to pain * 3: Severe; Avoided intercourse because of pain * Not applicable; I was not sexually active for reasons other than endometriosis or did not have sexual intercourse. Pain scores were averaged over the 35 days prior to each visit. Responses of Not Applicable were excluded.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study and with available baseline data and data at each time point; participants with responses of 'Not Applicable' on all reported days during baseline or for the entire time point were excluded from the analysis.

ArmMeasureGroupValue (MEAN)Dispersion
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 1-10.4 percent changeStandard Deviation 52.31
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 2-12.0 percent changeStandard Deviation 51.8
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 3-22.1 percent changeStandard Deviation 46.07
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 4-22.3 percent changeStandard Deviation 51.64
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 5-25.7 percent changeStandard Deviation 45.51
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 6-18.8 percent changeStandard Deviation 54.07
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 6-28.3 percent changeStandard Deviation 53.62
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 4-12.6 percent changeStandard Deviation 141.47
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 1-16.9 percent changeStandard Deviation 59.04
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 3-26.4 percent changeStandard Deviation 69.18
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 2-19.2 percent changeStandard Deviation 65.67
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 5-9.5 percent changeStandard Deviation 191.05
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 2-38.0 percent changeStandard Deviation 74.89
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 3-43.4 percent changeStandard Deviation 55.71
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 4-49.1 percent changeStandard Deviation 48.27
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 6-51.3 percent changeStandard Deviation 45.87
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 5-57.0 percent changeStandard Deviation 43.57
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 1-43.7 percent changeStandard Deviation 64.77
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 5-42.7 percent changeStandard Deviation 64.12
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 6-49.7 percent changeStandard Deviation 54.23
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 2-51.1 percent changeStandard Deviation 52.74
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 4-48.5 percent changeStandard Deviation 56.42
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 1-48.7 percent changeStandard Deviation 66.94
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Dyspareunia Based on Daily AssessmentMonth 3-49.1 percent changeStandard Deviation 46.47
Secondary

Percent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)

The NRS measured endometriosis-associated pain with and without menstruation on an 11-point scale from 0 = no pain to 10 = worst pain ever. Participants were asked to assess their endometriosis pain over the past 24 hours at it's worst at approximately the same time every day in the e-Diary. Pain scores were averaged over the 35 days prior to each visit.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study with available baseline data and data at each time point.

ArmMeasureGroupValue (MEAN)Dispersion
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 1-12.0 percent changeStandard Deviation 44.71
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 3-27.7 percent changeStandard Deviation 39.61
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 4-31.2 percent changeStandard Deviation 43.28
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 5-29.2 percent changeStandard Deviation 52.99
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 6-30.7 percent changeStandard Deviation 42.08
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 2-20.7 percent changeStandard Deviation 40.87
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 4-38.8 percent changeStandard Deviation 58.04
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 3-35.0 percent changeStandard Deviation 65.06
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 5-45.6 percent changeStandard Deviation 60.86
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 2-25.8 percent changeStandard Deviation 87.35
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 1-18.2 percent changeStandard Deviation 51.75
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 6-41.7 percent changeStandard Deviation 83.8
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 2-50.7 percent changeStandard Deviation 36.08
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 3-52.7 percent changeStandard Deviation 36.4
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 4-54.7 percent changeStandard Deviation 33.26
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 6-53.9 percent changeStandard Deviation 35.06
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 5-56.1 percent changeStandard Deviation 35.81
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 1-50.8 percent changeStandard Deviation 36.58
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 5-62.3 percent changeStandard Deviation 34.99
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 3-59.5 percent changeStandard Deviation 35.99
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 2-58.7 percent changeStandard Deviation 36.31
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 1-58.7 percent changeStandard Deviation 37.07
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 4-60.4 percent changeStandard Deviation 34.77
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Endometriosis-Associated Pain Score Assessed With Numeric Rating Scale (NRS)Month 6-61.1 percent changeStandard Deviation 33.71
Secondary

Percent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily Assessment

Participants assessed non-menstrual pelvic pain and its impact on their daily activities each day in an e-Diary according to the following response options: * 0: No discomfort * 1: Mild discomfort but I was easily able to do the things I usually do * 2: Moderate discomfort or pain that made it difficult to do some of the things I usually do * 3: Severe pain that made it difficult to do the things I usually do. Pain scores were averaged over the 35 days prior to each visit.

Time frame: Baseline (defined as baseline of Study M12-671 for participants who received elagolix in the pivotal study and baseline of the extension study M12-821 for participants who received placebo in the pivotal study) and months 1, 2, 3, 4, 5, and 6

Population: Participants who received at least 1 dose of double-blind study drug in this extension study with available baseline data and data at each time point.

ArmMeasureGroupValue (MEAN)Dispersion
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 2-7.8 percent changeStandard Deviation 71.5
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 5-30.4 percent changeStandard Deviation 44.88
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 1-7.3 percent changeStandard Deviation 57.59
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 4-25.0 percent changeStandard Deviation 53.14
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 3-24.5 percent changeStandard Deviation 53.77
Placebo/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 6-24.0 percent changeStandard Deviation 62.4
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 3-17.8 percent changeStandard Deviation 130.92
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 4-23.1 percent changeStandard Deviation 123.65
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 6-27.2 percent changeStandard Deviation 164.5
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 2-12.8 percent changeStandard Deviation 143.81
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 5-31.2 percent changeStandard Deviation 113.03
Placebo/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 1-11.3 percent changeStandard Deviation 64.29
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 4-53.2 percent changeStandard Deviation 37.47
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 1-47.9 percent changeStandard Deviation 39.03
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 2-48.6 percent changeStandard Deviation 38.7
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 3-50.7 percent changeStandard Deviation 38.41
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 5-54.9 percent changeStandard Deviation 39.53
Elagolix/Elagolix 150 mg QDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 6-53.6 percent changeStandard Deviation 40.41
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 6-55.9 percent changeStandard Deviation 41.01
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 5-57.4 percent changeStandard Deviation 42.84
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 1-54.0 percent changeStandard Deviation 41.77
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 4-54.4 percent changeStandard Deviation 40.89
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 3-54.5 percent changeStandard Deviation 41.7
Elagolix/Elagolix 200 mg BIDPercent Change From Baseline in Non-menstrual Pelvic Pain Based on Daily AssessmentMonth 2-53.1 percent changeStandard Deviation 42.04

Source: ClinicalTrials.gov · Data processed: Mar 5, 2026