Long-Term Maintenance of Optimal Treatment Targets for Skin and Itch Outcomes With Upadacitinib in Moderate to Severe Atopic Dermatitis: 140 Week Results From the Phase 3 Measure Up 1 and 2 Studies

Introduction: Despite undergoing prolonged systemic therapy, many patients with moderate-to-severe atopic dermatitis (AD) do not achieve optimal targets for skin and itch outcomes as defined by Aiming High in Eczema/AD (AHEAD) recommendations (eg, ≥90% improvement from baseline in Eczema Area and Severity Index [EASI 90] and Worst Pruritus Numerical Rating Scale [WP-NRS] score of 0/1 [no/minimal itch]). We evaluated long-term maintenance of optimal treatment targets with upadacitinib, an oral selective JAK inhibitor approved for moderate-to-severe AD in adolescents and adults. Methods: This 140-week interim analysis included adolescents and adults with moderate-to-severe AD who were randomized at baseline to upadacitinib 15 mg (UPA15) or 30 mg (UPA30) in the ongoing, phase 3, double-blind Measure Up 1 and 2 studies. Assessments included the proportion of patients (at the population level) who maintained EASI 90, WP-NRS 0/1, or simultaneous achievement of EASI 90 + WP-NRS 0/1 responses from week 16 (end of the placebo-controlled period) onwards. Data are reported as observed cases with no imputation for missing data. Results: Among patients who achieved EASI 90 at week 16 (UPA15, n=298; UPA30, n=384), EASI 90 was maintained by 79.8% (UPA15) and 83.7% (UPA30) at week 52, 76.7% (UPA15) and 83.0% (UPA30) at week 100, and 74.0% (UPA15) and 84.2% (UPA30) at week 140. Of patients achieving WP-NRS 0/1 at week 16 (UPA15, n=193; UPA30, n=281), WP-NRS 0/1 was maintained by 69.4% (UPA15) and 72.0% (UPA30) at week 52, 65.6% (UPA15) and 68.4% (UPA30) at week 100, and 62.3% (UPA15) and 66.0% (UPA30) at week 140. Of patients simultaneously achieving EASI 90 + WP-NRS 0/1 at week 16 (UPA15, n=156; UPA30, n=243), maintenance was achieved by 68.1% (UPA15) and 70.8% (UPA30) at week 52, 62.7% (UPA15) and 66.5% (UPA30) at week 100, and 58.7% (UPA15) and 64.4% (UPA30) at week 140. Among patients who did not maintain optimal outcomes, most still achieved clinically meaningful responses. Conclusion: Most patients maintained optimal skin and itch outcomes through 140 weeks of upadacitinib treatment, demonstrating its potential to provide sustained long-term disease control in atopic dermatitis.