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Greater Cumulative Benefits from Ixekizumab versus Ustekinumab Treatment over 52 Weeks for Patients with Moderate-to-Severe Psoriasis in a Randomized, Double-Blinded Phase 3b Clinical Trial

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Published:24th Feb 2020
Author: Blauvelt A, Lomaga M, Burge R, Zhu B, Shen W, Shrom D et al.
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Ref.:J Dermatolog Treat. 2020 Mar;31(2):141-146.
Greater cumulative benefits from ixekizumab versus ustekinumab treatment over 52 weeks for patients with moderate-to-severe psoriasis in a randomized, double-blinded phase 3b clinical trial

Ixekizumab (IXE), a high-affinity monoclonal antibody that selectively targets interleukin-17A, has shown superiority to ustekinumab (UST) and etanercept in skin clearance from randomized clinical trials in patients with moderate-to-severe psoriasis.

Objective: To compare cumulative benefits of IXE versus UST over 52 weeks of treatment.

Methods: Cumulative clinical benefit of IXE and UST was assessed by evaluating the AUC for responders of PASI, itch NRS, and DLQI outcomes over 52 weeks using data from IXORA-S trial [2] comparing IXE (N = 136) and UST (N = 166). Normalized cumulative benefit was calculated to obtain the percentage of the maximum AUC for each outcome measure. Missing values were imputed using nonresponder imputation.

Results: Significantly greater cumulative benefits were obtained for IXE compared with UST. Normalized cumulative benefit with IXE versus UST for PASI 75/90/100, Itch NRS (0), and DLQI (0,1) were 83.1% and 67.6%; 68.9% and 46.5%; 41.1% and 23.4%; 40.4% and 30.9%; and 62.2% and 46.6%, respectively. Cumulative clinical benefit ratios for IXE:UST were 1.23 for PASI 75, 1.48 for PASI 90, and 1.76 for PASI 100, indicating an increase in the cumulative clinical benefit for IXE versus UST as the clearance levels increased.

Conclusions: IXE showed greater cumulative clinical benefit than UST.

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