A Multicenter, Randomized, Double-Blind Placebo-Controlled Phase 3 Study to Evaluate the Pharmacokinetics, Efficacy and Safety of Deucravacitinib (BMS-986165) in Pediatric Subjects With Moderate to Severe Plaque Psoriasis

The purpose of this pediatric study is to evaluate the drug levels, efficacy and safety of Deucravacitinib in pediatric participants aged 4 to \<18 years with moderate to severe plaque psoriasis. This study includes two cohorts; Cohort 1 (age 12 to \<18 years) and Cohort 2 (age 4 to \<12 years), with two parts; for each cohort. Part A will evaluate the drug levels of BMS-986165 to enable selection of 2 dose levels to be studied in Part B. Part B will assess the efficacy and safety of two dose levels in pediatric participants with moderate to severe plaque psoriasis. The 5-year long-term extension (LTE) period will observe the long-term safety and tolerability of deucravacitinib in pediatric participants with psoriasis who have completed Parts A or B of the study.