Outcomes for Psoriasis by Self-Identified Racial Groups in Ixekizumab Clinical Trials: A Pooled Analysis.

Abstract

Biologics have shown promising outcomes in psoriasis clinical trials. However, there is a paucity of data exploring the potential differences in outcomes between self-identified racial groups. To evaluate treatment response to ixekizumab in patients with psoriasis across different self-identified racial subgroups. This study analyzed pooled data from 5 clinical studies (UNCOVER-1, UNCOVER-2, UNCOVER-3, IXORA-R, and IXORA-S) with patients of different self-identified racial subgroups, who were treated with an on-label dose of ixekizumab for psoriasis through 12 weeks. Treatment response to ixekizumab was assessed using the Psoriasis Area and Severity Index (PASI) and static Physician’s Global Assessment response rates. Patient Global Assessment of Disease Severity, Itch Numeric Rating Scale, Skin Pain Visual Analog Scale, and Dermatology Life Quality Index were used to evaluate the patient-reported outcomes (PROs) and impact on quality of life (QoL). A total of 1825 ixekizumab-treated patients from 5 pooled studies were included. Consistent with the clinical outcomes from the overall population, all self-identified racial groups showed rapid improvement in PASI through Week 12, although the response was somewhat slower in American Indian/Alaska Native patients. Differences in PROs and QoL assessments were observed among racial groups, especially in patients who identified as Black/African American and American Indian/Alaska Native. Ixekizumab is effective through 12 weeks of treatment for psoriasis across different self-identified racial groups. Sample sizes for some racial groups were small (N≤12), therefore, further research is required to understand potential differences in psoriasis treatment with ixekizumab between various racial groups.J Drugs Dermatol. 2024;23(2):17-22.  doi:10.36849/JDD.7672.