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This study compared efficacy, safety, tolerability, pharmacokinetics (PK), and immunogenicity between AVT04 and reference product (RP) ustekinumab (Stelara®) in patients with moderate-to-severe chronic plaque psoriasis (PsO). This multicenter, double-blind, 52-week study randomized patients in 1:2 ratio to AVT04 or RP. At week 16, responsive patients (≥50% improvement in psoriasis area and severity index (PASI)) previously on AVT04 continued on AVT04, while those on RP were re-randomized 1:1 to switch to AVT04 or stay on RP. The primary endpoint was a percent improvement in PASI from baseline to week 12. Therapeutic equivalence was demonstrated if the confidence interval (CI) for the adjusted difference in means was contained within the equivalence margins; ±10% (90%CI). Of the 581 patients initially randomized (AVT04:RP, 194:387), 575 completed week 16 and 544 completed end of study visit. The percent PASI improvement for AVT04 vs RP was 87.3% vs 86.8% (CI: −2.14%, 3.01%); study met its primary endpoint. Efficacy, safety and PK profiles were comparable across treatment arms throughout the entire study duration, and the incidence of antibodies to ustekinumab had no clinically meaningful impact. This study demonstrates the therapeutic equivalence between AVT04 and RP in patients with moderate-to-severe chronic PsO, with similar safety and tolerability. NCT04930042; EudraCT Number: 2020-004,493-22

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Randomized, double-blind, multicenter study to evaluate efficacy, safety, tolerability, and immunogenicity between AVT04 and the reference product ustekinumab in patients with moderate-to-severe chronic plaque psoriasis