A Study to Determine the Efficacy and Safety of Deucravacitinib Compared With Placebo in Participants With Active Psoriatic Arthritis (PsA) Who Are Naïve to Biologic Disease Modifying Anti-rheumatic Drugs or Had Previously Received TNFα Inhibitor Treatment

The purpose of this study is to evaluate the safety and efficacy of deucravacitinib versus placebo for the treatment of participants with active PsA who are naïve to biologic disease modifying antirheumatic drugs or had previously received TNFα inhibitor treatment.The long term extension period will provide additional long-term safety and efficacy information.