Indirect comparisons of ixekizumab versus three interleukin-23 p19 inhibitors in patients with moderate-to-severe plaque psoriasis - efficacy findings up to week 12

Abstract

Background: It is challenging to select the most appropriate biologic treatment for patients with moderate-to-severe plaque psoriasis.

Objective: To compare speed of onset and level of skin improvement between the interleukin (IL)-17A antagonist ixekizumab and the IL-23 p19 inhibitors guselkumab, tildrakizumab, and risankizumab in patients with moderate-to-severe plaque psoriasis.

Methods: Using data from controlled clinical trials, both adjusted indirect comparisons (AICs) and matching adjusted indirect comparisons (MAICs) were performed to determine the risk difference (RD) between ixekizumab and each IL-23 p19 inhibitor for the proportion of patients with ≥75%/90%/100% improvement compared with baseline in Psoriasis Area and Severity Index (PASI 75/90/100) up to week 12. Placebo, etanercept, or ustekinumab were used as the comparator bridge.

Results: In all (M)AICs, RDs generally significantly favored ixekizumab over guselkumab (placebo bridge), tildrakizumab (placebo or etanercept bridge), and risankizumab (placebo or ustekinumab bridge) from the earliest assessment time (≥ week 2) to week 12 when considering PASI 75/90/100 responses.

Conclusion: Ixekizumab provides a faster onset of effect and earlier clinical benefits than guselkumab, tildrakizumab, or risankizumab in patients with moderate-to-severe psoriasis, as reflected by higher levels of skin improvement than with these IL-23 p19 inhibitors up to week 12.

Keywords: Ixekizumab; indirect comparison; interleukin-23 inhibitors; psoriasis.