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A Study to Assess Treat-to-Target and Dosing Flexibility of Oral Upadacitinib Tablets in Adult Participants With Moderate to Severe Atopic Dermatitis

A Phase 3b/4 Randomized, Blinded, Treat-to-Target and Dose-Flexibility Study of Upadacitinib in Adult Subjects With Moderate to Severe Atopic Dermatitis

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05507580
Acronym
Flex-Up
Enrollment
461
Registered
2022-08-19
Start date
2023-05-29
Completion date
2024-08-15
Last updated
2025-07-29

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

Conditions

Atopic Dermatitis

Keywords

Atopic Dermatitis (AD), Upadacitinib, RINVOQ

Brief summary

Atopic dermatitis (AD) is a skin condition that may cause a rash and itching due to inflammation of the skin. Therapies spread over the skin may not be enough to control the AD in trial participants who require systemic anti-inflammatory treatment. This study evaluates the dosing flexibility of upadacitinib in adult participants with moderate to severe AD. Adverse events and change in the disease activity will be assessed. Upadacitinib is an approved drug for the treatment of moderate to severe/active immune-mediated inflammatory diseases such as rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, ulcerative colitis (UC), Crohn's Disease (CD), and AD. The study is comprised of a 35-day Screening Period, a 12-week double-blind period and a 12-week single-blind period. During the double-blind period, participants are placed in 1 of 2 groups, called treatment arms and will be randomized in a 1:1 ratio to receive upadacitinib. At 12 weeks during the single blind period, participants will be blinded to the upadacitinib dose based on their EASI response and reassigned to in 1 of 4 arms. After the last study visit, there is a 30-day follow-up visit. Approximately 454 adult participants ages 18 to 64 with moderate to severe AD who are candidates for systemic therapy will be enrolled at up to 160 sites worldwide. The study is comprised of a 12-week double-blind period, followed by a 12-week single-blind period. Participants will receive upadacitinib oral tablets once daily for up to 24 weeks. There may be higher treatment burden for participants in this trial compared to their standard of care (due to study procedures). Participants will attend regular visits during the study at a hospital or clinic. The effect of the treatment will be checked by medical assessments, blood tests, checking for side effects and completing questionnaires.

Interventions

DRUGUpadacitinib

Oral tablet

Sponsors

AbbVie
Lead SponsorINDUSTRY

Study design

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

Eligibility

Sex/Gender
ALL
Age
18 Years to 64 Years
Healthy volunteers
No

Inclusion criteria

* Chronic atopic dermatitis (AD) with onset of symptoms at least 3 years prior to Baseline and participant meets Hanifin and Rajka criteria. * Eczema Area and Severity Index (EASI) score \>= 16, vIGA-AD score \>= 3 and \>= 10% Body Surface Area (BSA) of AD involvement at the Baseline Visit. * Baseline weekly average of daily Worst Pruritus NRS \>= 4. * Candidate for systemic treatment defined as prior use of systemic treatment for AD, OR previous inadequate response to TCS, TCI or PDE-4 inhibitors, OR for whom topical treatments are otherwise medically inadvisable.

Exclusion criteria

* Participants with current or past history of infection including: * Two or more episodes of herpes zoster, or one or more episodes of disseminated herpes zoster; * One or more episodes of disseminated herpes simplex (including eczema herpeticum); * Human immunodeficiency virus (HIV) infection defined as confirmed positive anti-HIV antibody (HIV Ab) test; * Active tuberculosis (TB) or meet TB exclusionary parameters (protocol specified requirements for TB testing); * Japan only: Positive result of beta-D-glucan (screening for Pneumocystis jirovecii infection) or two consecutive indeterminate results of beta-D-glucan during the Screening Period; * Active infection(s) requiring treatment with intravenous anti-infectives within 30 days, or oral/intramuscular anti-infectives within 14 days prior to the Baseline Visit; * Chronic recurring infection and/or active viral infection that, based on the investigator's clinical assessment, makes the participant an unsuitable candidate for the study; * COVID-19 infection: In participants who tested positive for COVID, at least 5 days must have passed since a COVID-19 positive test result for study entry of asymptomatic participants. Participants with mild/moderate COVID-19 infection can be enrolled if fever is resolved without use of antipyretics for 24 hours and other symptoms improved, or if 5 days have passed since the COVID-19 positive test result (whichever comes last). Participants may be rescreened if judged to be in good general health, as determined by the investigator based upon the medical history and physical examination. * Evidence of Hepatitis B virus (HBV) or Hepatitis C virus (HCV). * Any of the following medical diseases or disorders: * Recent (within past 6 months) cerebrovascular accident, myocardial infarction, coronary stenting, and aorto-coronary bypass surgery; * History of an organ transplant which requires continued immunosuppression; * History of an allergic reaction or significant sensitivity to constituents of the study drug (and its excipients) and/or other products in the same class; * History of gastrointestinal perforation (other than due to appendicitis or mechanical injury), diverticulitis, or significantly increased risk for gastrointestinal perforation per investigator judgment; * Conditions that could interfere with drug absorption including but not limited to short bowel syndrome or gastric bypass surgery; participants with a history of gastric banding/segmentation are not excluded; * History of malignancy except for successfully treated non-melanoma skin cancer (NMSC) or localized carcinoma in situ of the cervix.

Design outcomes

Primary

MeasureTime frameDescription
Percentage of Participants Achieving ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) at Week 24Baseline and Week 24The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).

Secondary

MeasureTime frameDescription
Percentage of Participants Achieving a 100% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 100) at Week 24Baseline and Week 24The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).
Percentage of Participants Achieving ≥ 75% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 75) at Week 12Baseline and Week 12The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).
Percentage of Participants Achieving ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) at Week 12Baseline and Week 12The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).
Percentage of Participants Achieving a 100% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 100) at Week 12Baseline and Week 12The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).
Percentage of Participants Achieving a ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) and Worst Pruritus Numerical Rating Scale of 0 or 1 (WP-NRS 0/1) at Week 12 Among Those With WP-NRS > 1 at BaselineBaseline and Week 12The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%). The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).
Percentage of Participants Achieving a ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) and Worst Pruritus Numerical Rating Scale of 0 or 1 (WP-NRS 0/1) at Week 24 Among Those With WP-NRS > 1 at BaselineBaseline and Week 24The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%). The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).
Percentage of Participants Achieving Validated Investigator Global Assessment for Atopic Dermatitis (vlGA-AD) of 0 or 1 at Week 12At Week 12vIGA-AD is a validated assessment instrument used in clinical studies to rate the severity of AD globally. A 5-point scale is used to measure the severity of disease at the time of the investigator's evaluation of the participant ranging from 0 - Clear (no inflammatory signs of atopic dermatitis \[no erythema, no induration/papulation, no lichenification, no oozing/crusting\] Post-inflammatory hyperpigmentation and/or hypopigmentation may be present) to 4 - Severe (marked erythema \[deep or bright red\], marked induration/papulation, and/or marked lichenification).
Percentage of Participants Achieving Validated Investigator Global Assessment for Atopic Dermatitis (vlGA-AD) of 0 or 1 at Week 24At Week 24vIGA-AD is a validated assessment instrument used in clinical studies to rate the severity of AD globally. A 5-point scale is used to measure the severity of disease at the time of the investigator's evaluation of the participant ranging from 0 - Clear (no inflammatory signs of atopic dermatitis \[no erythema, no induration/papulation, no lichenification, no oozing/crusting\] Post-inflammatory hyperpigmentation and/or hypopigmentation may be present) to 4 - Severe (marked erythema \[deep or bright red\], marked induration/papulation, and/or marked lichenification).
Percentage of Participants Achieving ≥ 75% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 75) at Week 24Baseline and Week 24The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).
Percentage of Participants Achieving an Improvement (Reduction) in Worst Pruritus Numerical Rating Scale (WP-NRS) ≥4 at Week 24 Among Those With Baseline WP-NRS ≥4Baseline and Week 24The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).
Percentage of Participants Achieving Worst Pruritus Numerical Rating Scale (WP-NRS) of 0 or 1 at Week 12 Among Those With Baseline WP-NRS >1Baseline and Week 12The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).
Percentage of Participants Achieving Worst Pruritus Numerical Rating Scale (WP-NRS) of 0 or 1 at Week 24 Among Those With Baseline WP-NRS >1Baseline and Week 24The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).
Percentage of Participants Achieving Improvement (Reduction) in Dermatology Life Quality Index (DLQI) ≥4 at Week 12 Among Those With Baseline DLQI ≥4Baseline and Week 12DLQI is a 10-item, validated questionnaire used in clinical practice and clinical trials to assess the impact of atopic dermatitis (AD) disease symptoms and treatment on health-related quality of life (HRQoL). It consists of 10 questions assessing impact of skin diseases on different aspects of participant's QoL over the prior week. Each item is scored on a 4-point scale: 0 = not at all/not relevant; 1 = a little; 2 = a lot; and 3 = very much. Item scores (0 to 3) are added to provide a total score range of 0 to 30. Higher scores indicate greater impairment of HRQoL.
Percentage of Participants Achieving Improvement (Reduction) in Dermatology Life Quality Index (DLQI) ≥4 at Week 24 Among Those With Baseline DLQI ≥4Baseline and Week 24DLQI is a 10-item, validated questionnaire used in clinical practice and clinical trials to assess the impact of atopic dermatitis (AD) disease symptoms and treatment on health-related quality of life (HRQoL). It consists of 10 questions assessing impact of skin diseases on different aspects of participant's QoL over the prior week. Each item is scored on a 4-point scale: 0 = not at all/not relevant; 1 = a little; 2 = a lot; and 3 = very much. Item scores (0 to 3) are added to provide a total score range of 0 to 30. Higher scores indicate greater impairment of HRQoL.
Percentage of Participants Achieving Dermatology Life Quality Index (DLQI) of 0 or 1 At Week 12 Among Those With Baseline DLQI >1Baseline and Week 12DLQI is a 10-item, validated questionnaire used in clinical practice and clinical trials to assess the impact of atopic dermatitis (AD) disease symptoms and treatment on health-related quality of life (HRQoL). It consists of 10 questions assessing impact of skin diseases on different aspects of participant's QoL over the prior week. Each item is scored on a 4-point scale: 0 = not at all/not relevant; 1 = a little; 2 = a lot; and 3 = very much. Item scores (0 to 3) are added to provide a total score range of 0 to 30. Higher scores indicate greater impairment of HRQoL.
Percentage of Participants Achieving Dermatology Life Quality Index (DLQI) of 0 or 1 At Week 24 Among Those With Baseline DLQI >1Baseline and Week 24DLQI is a 10-item, validated questionnaire used in clinical practice and clinical trials to assess the impact of atopic dermatitis (AD) disease symptoms and treatment on health-related quality of life (HRQoL). It consists of 10 questions assessing impact of skin diseases on different aspects of participant's QoL over the prior week. Each item is scored on a 4-point scale: 0 = not at all/not relevant; 1 = a little; 2 = a lot; and 3 = very much. Item scores (0 to 3) are added to provide a total score range of 0 to 30. Higher scores indicate greater impairment of HRQoL.
Percentage of Participants Achieving an Improvement (Reduction) in Worst Pruritus Numerical Rating Scale (WP-NRS) ≥4 at Week 12 Among Those With Baseline WP-NRS ≥4Baseline and Week 12The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).

Countries

Australia, Belgium, Bulgaria, Canada, China, Germany, Hungary, Italy, Japan, Netherlands, New Zealand, Poland, Portugal, Slovakia, South Korea, Spain, Taiwan, United Kingdom

Participant flow

Pre-assignment details

The study comprised of a 35-day Screening Period, a 12-week Double-Blind Treatment Period and a 12-week Single-Blind Treatment Period. During the Single-Blind Period, participants were blinded to the upadacitinib dose and Eczema Area and Severity Index (EASI) score evaluations.

Participants by arm

ArmCount
UPA 15 mg Double-Blind Treatment Period
Participants received 15 mg upadacitinib orally once daily (QD) for 12 weeks during the Double-Blind Treatment Period.
229
UPA 30 mg Double-Blind Treatment Period
Participants received 30 mg upadacitinib orally once daily (QD) for 12 weeks during the Double-Blind Treatment Period.
232
Total461

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003FG004FG005
Double-Blind Treatment PeriodLost to Follow-up010000
Double-Blind Treatment PeriodOther, not specified540000
Double-Blind Treatment PeriodWithdrawal by Subject710000
Single-Blind Treatment PeriodLost to Follow-up000021
Single-Blind Treatment PeriodOther, not specified002735
Single-Blind Treatment PeriodWithdrawal by Subject000526

Baseline characteristics

CharacteristicUPA 30 mg Double-Blind Treatment PeriodTotalUPA 15 mg Double-Blind Treatment Period
Age, Continuous32.7 years
STANDARD_DEVIATION 10.83
33.5 years
STANDARD_DEVIATION 11.48
34.4 years
STANDARD_DEVIATION 12.06
Ethnicity (NIH/OMB)
Hispanic or Latino
9 Participants19 Participants10 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
223 Participants442 Participants219 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants1 Participants1 Participants
Race (NIH/OMB)
Asian
66 Participants133 Participants67 Participants
Race (NIH/OMB)
Black or African American
3 Participants5 Participants2 Participants
Race (NIH/OMB)
More than one race
0 Participants2 Participants2 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
4 Participants6 Participants2 Participants
Race (NIH/OMB)
Unknown or Not Reported
1 Participants1 Participants0 Participants
Race (NIH/OMB)
White
158 Participants313 Participants155 Participants
Sex: Female, Male
Female
110 Participants205 Participants95 Participants
Sex: Female, Male
Male
122 Participants256 Participants134 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
EG005
affected / at risk
deaths
Total, all-cause mortality
0 / 2290 / 2320 / 720 / 1440 / 1330 / 91
other
Total, other adverse events
41 / 22967 / 23217 / 7238 / 14439 / 13333 / 91
serious
Total, serious adverse events
8 / 2290 / 2321 / 721 / 1441 / 1330 / 91

Outcome results

Primary

Percentage of Participants Achieving ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) at Week 24

The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).

Time frame: Baseline and Week 24

Population: Intent-to-Treat (ITT\_2) Population: all participants who were allocated to an assigned dose at Week 12 for the Single-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) at Week 2474.6 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) at Week 2448.1 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) at Week 2468.5 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) at Week 2429.3 percentage of participants
Secondary

Percentage of Participants Achieving ≥ 75% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 75) at Week 12

The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).

Time frame: Baseline and Week 12

Population: Intent-to-Treat (ITT\_1) Population: all participants who were randomized in the Double-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 75% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 75) at Week 1264.4 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 75% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 75) at Week 1279.3 percentage of participants
Secondary

Percentage of Participants Achieving ≥ 75% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 75) at Week 24

The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).

Time frame: Baseline and Week 24

Population: Intent-to-Treat (ITT\_2) Population: all participants who were allocated to an assigned dose at Week 12 for the Single-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 75% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 75) at Week 2497.2 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 75% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 75) at Week 2469.2 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 75% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 75) at Week 2488.5 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 75% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 75) at Week 2452.4 percentage of participants
Secondary

Percentage of Participants Achieving ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) at Week 12

The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).

Time frame: Baseline and Week 12

Population: Intent-to-Treat (ITT\_1) Population: all participants who were randomized in the Double-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) at Week 1233.8 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) at Week 1259.9 percentage of participants
Secondary

Percentage of Participants Achieving a 100% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 100) at Week 12

The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).

Time frame: Baseline and Week 12

Population: Intent-to-Treat (ITT\_1) Population: all participants who were randomized in the Double-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a 100% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 100) at Week 127.7 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a 100% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 100) at Week 1215.9 percentage of participants
Secondary

Percentage of Participants Achieving a 100% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 100) at Week 24

The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) are assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%).

Time frame: Baseline and Week 24

Population: Intent-to-Treat (ITT\_2) Population: all participants who were allocated to an assigned dose at Week 12 for the Single-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a 100% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 100) at Week 2433.8 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a 100% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 100) at Week 247.5 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a 100% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 100) at Week 2421.5 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a 100% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 100) at Week 243.7 percentage of participants
Secondary

Percentage of Participants Achieving a ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) and Worst Pruritus Numerical Rating Scale of 0 or 1 (WP-NRS 0/1) at Week 12 Among Those With WP-NRS > 1 at Baseline

The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%). The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).

Time frame: Baseline and Week 12

Population: Intent-to-Treat (ITT\_1) Population: all participants who were randomized in the Double-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) and Worst Pruritus Numerical Rating Scale of 0 or 1 (WP-NRS 0/1) at Week 12 Among Those With WP-NRS > 1 at Baseline18.0 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) and Worst Pruritus Numerical Rating Scale of 0 or 1 (WP-NRS 0/1) at Week 12 Among Those With WP-NRS > 1 at Baseline32.5 percentage of participants
Secondary

Percentage of Participants Achieving a ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) and Worst Pruritus Numerical Rating Scale of 0 or 1 (WP-NRS 0/1) at Week 24 Among Those With WP-NRS > 1 at Baseline

The EASI is a composite index with scores ranging from 0 to 72. Four atopic dermatitis (AD) disease characteristics (erythema, thickness \[induration, papulation, edema\], scratching \[excoriation\], and lichenification) assessed for severity on a scale of 0 (absent) through 3 (severe). In addition, the area of AD involvement is assessed as a percentage by body area of head, trunk (including the genital area), upper extremities, and lower extremities (including the buttocks), and converted to a score of 0 to 6. In each body region, the area is expressed as 0, 1 (1% to 9%), 2 (10% to 29%), 3 (30% to 49%), 4 (50% to 69%), 5 (70% to 89%), or 6 (90% to 100%). The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).

Time frame: Baseline and Week 24

Population: Intent-to-Treat (ITT\_2) Population: all participants who were allocated to an assigned dose at Week 12 for the Single-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) and Worst Pruritus Numerical Rating Scale of 0 or 1 (WP-NRS 0/1) at Week 24 Among Those With WP-NRS > 1 at Baseline38.5 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) and Worst Pruritus Numerical Rating Scale of 0 or 1 (WP-NRS 0/1) at Week 24 Among Those With WP-NRS > 1 at Baseline20.7 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) and Worst Pruritus Numerical Rating Scale of 0 or 1 (WP-NRS 0/1) at Week 24 Among Those With WP-NRS > 1 at Baseline35.0 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving a ≥ 90% Reduction From Baseline in Eczema Area and Severity Index Score (EASI 90) and Worst Pruritus Numerical Rating Scale of 0 or 1 (WP-NRS 0/1) at Week 24 Among Those With WP-NRS > 1 at Baseline20.3 percentage of participants
Secondary

Percentage of Participants Achieving an Improvement (Reduction) in Worst Pruritus Numerical Rating Scale (WP-NRS) ≥4 at Week 12 Among Those With Baseline WP-NRS ≥4

The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).

Time frame: Baseline and Week 12

Population: Intent-to-Treat (ITT\_1) Population: all participants who were randomized in the Double-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving an Improvement (Reduction) in Worst Pruritus Numerical Rating Scale (WP-NRS) ≥4 at Week 12 Among Those With Baseline WP-NRS ≥453.3 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving an Improvement (Reduction) in Worst Pruritus Numerical Rating Scale (WP-NRS) ≥4 at Week 12 Among Those With Baseline WP-NRS ≥467.7 percentage of participants
Secondary

Percentage of Participants Achieving an Improvement (Reduction) in Worst Pruritus Numerical Rating Scale (WP-NRS) ≥4 at Week 24 Among Those With Baseline WP-NRS ≥4

The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).

Time frame: Baseline and Week 24

Population: Intent-to-Treat (ITT\_2) Population: all participants who were allocated to an assigned dose at Week 12 for the Single-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving an Improvement (Reduction) in Worst Pruritus Numerical Rating Scale (WP-NRS) ≥4 at Week 24 Among Those With Baseline WP-NRS ≥473.1 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving an Improvement (Reduction) in Worst Pruritus Numerical Rating Scale (WP-NRS) ≥4 at Week 24 Among Those With Baseline WP-NRS ≥457.3 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving an Improvement (Reduction) in Worst Pruritus Numerical Rating Scale (WP-NRS) ≥4 at Week 24 Among Those With Baseline WP-NRS ≥467.0 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving an Improvement (Reduction) in Worst Pruritus Numerical Rating Scale (WP-NRS) ≥4 at Week 24 Among Those With Baseline WP-NRS ≥460.0 percentage of participants
Secondary

Percentage of Participants Achieving Dermatology Life Quality Index (DLQI) of 0 or 1 At Week 12 Among Those With Baseline DLQI >1

DLQI is a 10-item, validated questionnaire used in clinical practice and clinical trials to assess the impact of atopic dermatitis (AD) disease symptoms and treatment on health-related quality of life (HRQoL). It consists of 10 questions assessing impact of skin diseases on different aspects of participant's QoL over the prior week. Each item is scored on a 4-point scale: 0 = not at all/not relevant; 1 = a little; 2 = a lot; and 3 = very much. Item scores (0 to 3) are added to provide a total score range of 0 to 30. Higher scores indicate greater impairment of HRQoL.

Time frame: Baseline and Week 12

Population: Intent-to-Treat (ITT\_1) Population: all participants who were randomized in the Double-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Dermatology Life Quality Index (DLQI) of 0 or 1 At Week 12 Among Those With Baseline DLQI >122.2 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Dermatology Life Quality Index (DLQI) of 0 or 1 At Week 12 Among Those With Baseline DLQI >136.5 percentage of participants
Secondary

Percentage of Participants Achieving Dermatology Life Quality Index (DLQI) of 0 or 1 At Week 24 Among Those With Baseline DLQI >1

DLQI is a 10-item, validated questionnaire used in clinical practice and clinical trials to assess the impact of atopic dermatitis (AD) disease symptoms and treatment on health-related quality of life (HRQoL). It consists of 10 questions assessing impact of skin diseases on different aspects of participant's QoL over the prior week. Each item is scored on a 4-point scale: 0 = not at all/not relevant; 1 = a little; 2 = a lot; and 3 = very much. Item scores (0 to 3) are added to provide a total score range of 0 to 30. Higher scores indicate greater impairment of HRQoL.

Time frame: Baseline and Week 24

Population: Intent-to-Treat (ITT\_2) Population: all participants who were allocated to an assigned dose at Week 12 for the Single-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Dermatology Life Quality Index (DLQI) of 0 or 1 At Week 24 Among Those With Baseline DLQI >142.0 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Dermatology Life Quality Index (DLQI) of 0 or 1 At Week 24 Among Those With Baseline DLQI >124.0 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Dermatology Life Quality Index (DLQI) of 0 or 1 At Week 24 Among Those With Baseline DLQI >135.4 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Dermatology Life Quality Index (DLQI) of 0 or 1 At Week 24 Among Those With Baseline DLQI >115.2 percentage of participants
Secondary

Percentage of Participants Achieving Improvement (Reduction) in Dermatology Life Quality Index (DLQI) ≥4 at Week 12 Among Those With Baseline DLQI ≥4

DLQI is a 10-item, validated questionnaire used in clinical practice and clinical trials to assess the impact of atopic dermatitis (AD) disease symptoms and treatment on health-related quality of life (HRQoL). It consists of 10 questions assessing impact of skin diseases on different aspects of participant's QoL over the prior week. Each item is scored on a 4-point scale: 0 = not at all/not relevant; 1 = a little; 2 = a lot; and 3 = very much. Item scores (0 to 3) are added to provide a total score range of 0 to 30. Higher scores indicate greater impairment of HRQoL.

Time frame: Baseline and Week 12

Population: Intent-to-Treat (ITT\_1) Population: all participants who were randomized in the Double-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Improvement (Reduction) in Dermatology Life Quality Index (DLQI) ≥4 at Week 12 Among Those With Baseline DLQI ≥477.5 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Improvement (Reduction) in Dermatology Life Quality Index (DLQI) ≥4 at Week 12 Among Those With Baseline DLQI ≥488.9 percentage of participants
Secondary

Percentage of Participants Achieving Improvement (Reduction) in Dermatology Life Quality Index (DLQI) ≥4 at Week 24 Among Those With Baseline DLQI ≥4

DLQI is a 10-item, validated questionnaire used in clinical practice and clinical trials to assess the impact of atopic dermatitis (AD) disease symptoms and treatment on health-related quality of life (HRQoL). It consists of 10 questions assessing impact of skin diseases on different aspects of participant's QoL over the prior week. Each item is scored on a 4-point scale: 0 = not at all/not relevant; 1 = a little; 2 = a lot; and 3 = very much. Item scores (0 to 3) are added to provide a total score range of 0 to 30. Higher scores indicate greater impairment of HRQoL.

Time frame: Baseline and Week 24

Population: Intent-to-Treat (ITT\_2) Population: all participants who were allocated to an assigned dose at Week 12 for the Single-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Improvement (Reduction) in Dermatology Life Quality Index (DLQI) ≥4 at Week 24 Among Those With Baseline DLQI ≥488.1 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Improvement (Reduction) in Dermatology Life Quality Index (DLQI) ≥4 at Week 24 Among Those With Baseline DLQI ≥482.2 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Improvement (Reduction) in Dermatology Life Quality Index (DLQI) ≥4 at Week 24 Among Those With Baseline DLQI ≥484.7 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Improvement (Reduction) in Dermatology Life Quality Index (DLQI) ≥4 at Week 24 Among Those With Baseline DLQI ≥474.0 percentage of participants
Secondary

Percentage of Participants Achieving Validated Investigator Global Assessment for Atopic Dermatitis (vlGA-AD) of 0 or 1 at Week 12

vIGA-AD is a validated assessment instrument used in clinical studies to rate the severity of AD globally. A 5-point scale is used to measure the severity of disease at the time of the investigator's evaluation of the participant ranging from 0 - Clear (no inflammatory signs of atopic dermatitis \[no erythema, no induration/papulation, no lichenification, no oozing/crusting\] Post-inflammatory hyperpigmentation and/or hypopigmentation may be present) to 4 - Severe (marked erythema \[deep or bright red\], marked induration/papulation, and/or marked lichenification).

Time frame: At Week 12

Population: Intent-to-Treat (ITT\_1) Population: all participants who were randomized in the Double-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Validated Investigator Global Assessment for Atopic Dermatitis (vlGA-AD) of 0 or 1 at Week 1229.7 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Validated Investigator Global Assessment for Atopic Dermatitis (vlGA-AD) of 0 or 1 at Week 1251.5 percentage of participants
Secondary

Percentage of Participants Achieving Validated Investigator Global Assessment for Atopic Dermatitis (vlGA-AD) of 0 or 1 at Week 24

vIGA-AD is a validated assessment instrument used in clinical studies to rate the severity of AD globally. A 5-point scale is used to measure the severity of disease at the time of the investigator's evaluation of the participant ranging from 0 - Clear (no inflammatory signs of atopic dermatitis \[no erythema, no induration/papulation, no lichenification, no oozing/crusting\] Post-inflammatory hyperpigmentation and/or hypopigmentation may be present) to 4 - Severe (marked erythema \[deep or bright red\], marked induration/papulation, and/or marked lichenification).

Time frame: At Week 24

Population: Intent-to-Treat (ITT\_2) Population: all participants who were allocated to an assigned dose at Week 12 for the Single-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Validated Investigator Global Assessment for Atopic Dermatitis (vlGA-AD) of 0 or 1 at Week 2463.4 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Validated Investigator Global Assessment for Atopic Dermatitis (vlGA-AD) of 0 or 1 at Week 2440.6 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Validated Investigator Global Assessment for Atopic Dermatitis (vlGA-AD) of 0 or 1 at Week 2452.3 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Validated Investigator Global Assessment for Atopic Dermatitis (vlGA-AD) of 0 or 1 at Week 2429.3 percentage of participants
Secondary

Percentage of Participants Achieving Worst Pruritus Numerical Rating Scale (WP-NRS) of 0 or 1 at Week 12 Among Those With Baseline WP-NRS >1

The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).

Time frame: Baseline and Week 12

Population: Intent-to-Treat (ITT\_1) Population: all participants who were randomized in the Double-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Worst Pruritus Numerical Rating Scale (WP-NRS) of 0 or 1 at Week 12 Among Those With Baseline WP-NRS >127.3 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Worst Pruritus Numerical Rating Scale (WP-NRS) of 0 or 1 at Week 12 Among Those With Baseline WP-NRS >140.0 percentage of participants
Secondary

Percentage of Participants Achieving Worst Pruritus Numerical Rating Scale (WP-NRS) of 0 or 1 at Week 24 Among Those With Baseline WP-NRS >1

The Worst Pruritus NRS is an assessment tool that participants used to report the intensity of their pruritus during a 24-hour recall period using an electronic hand-held device. Participants rated itch (pruritus) intensity at its worst during the past 24 hours on an 11-point scale from 0 (no itch) to 10 (worst imaginable itch).

Time frame: Baseline and Week 24

Population: Intent-to-Treat (ITT\_2) Population: all participants who were allocated to an assigned dose at Week 12 for the Single-Blind Treatment Period; participants with available data, as observed analysis

ArmMeasureValue (NUMBER)
UPA 15 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Worst Pruritus Numerical Rating Scale (WP-NRS) of 0 or 1 at Week 24 Among Those With Baseline WP-NRS >146.2 percentage of participants
UPA 15 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Worst Pruritus Numerical Rating Scale (WP-NRS) of 0 or 1 at Week 24 Among Those With Baseline WP-NRS >132.5 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 15 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Worst Pruritus Numerical Rating Scale (WP-NRS) of 0 or 1 at Week 24 Among Those With Baseline WP-NRS >138.0 percentage of participants
UPA 30 mg Double-Blind Treatment Period --> UPA 30 mg Single-Blind Treatment PeriodPercentage of Participants Achieving Worst Pruritus Numerical Rating Scale (WP-NRS) of 0 or 1 at Week 24 Among Those With Baseline WP-NRS >128.3 percentage of participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026