531 - Physician-assessed Effectiveness and Patient-Reported Outcomes in Adult and Adolescent Patients with Atopic Dermatitis Treated with Dupilumab: Real-World Insights 1 Year into the GLOBOSTAD Multinational Prospective Observational Study

Introduction The GLOBOSTAD study aims to assess the extended real-world effectiveness of dupilumab in patients with atopic dermatitis (AD) receiving dupilumab as part of their normal care. Objectives To report patient-reported outcomes and physician-­assessed AD clinical measures for evaluating disease characteristics, severity, and treatment effectiveness 1 year after initiating dupilumab treatment. Methods This 5-year, multinational, prospective, observational study (NCT03992417) enrolled patients aged ≥12 years with moderate-to-severe AD. Patients received dupilumab based on country-specific prescribing information. Assessments were performed at baseline, 3 months (± 1 month), 6 months (± 2 months), and 12 months (± 2 months). Data are reported as observed for enrollment/safety (N = 955; data cutoff: March 2023) and follow-up (N = 903) populations including 13 adolescent patients with AD (≥12 and <18 years old). Results In this study, 758/863/705 patients completed ≥1 follow-up assessment at 3 months/6 months/12 months, respectively. During the study the mean (standard deviation [SD]) Eczema Area and Severity Index (EASI; >21 = severe; ≤7 = mild/no disease) scores decreased from 25.1 (12.8) at baseline to 6.1 (8.0) at 3 months, 4.6 (6.4) at 6 months and sustaining throughout the observation period [12 months; 4.2 (8.4)]. Mean Patient-Oriented Eczema Measure (SD) improved from 19.7 (6.4) at baseline descending to 8.7 (6.6) at 3 months, 7.7 (6.0) at 6 months and 7.1 (5.8) at 12 months. A significant improvement was also observed in Dermatology Life Quality Index (DLQI) from 13.7 (7.1) to 5.3 (5.1) to 4.4 (4.4) to 3.9 (4.2); and children’s DLQI from 12.2 (6.2) to 2.7 (2.9) to 2.9 (3.0) to 4.8 (4.8) by the end of the 3, 6 and 12-months observational period respectively. Dupilumab-related adverse events were reported in 187 (20.8%) patients. Conclusions In a real-world scenario, the initiation of dupilumab treatment led to early and sustained improvements in AD outcome measures throughout the 1-year observational period. Safety data remained consistent with findings from previous studies.