Safety and Efficacy of Upadacitinib in Patients With Active Ankylosing Spondylitis and an Inadequate Response to Nonsteroidal Antiinflammatory Drug Therapy: One‐Year Results of a Double‐Blind, Placebo‐Controlled Study and Open‐Label Extension

To report the efficacy and safety of upadacitinib through 1 year in patients with ankylosing spondylitis (AS).In the SELECT-AXIS 1 study, adults with active AS and an inadequate response to nonsteroidal antiinflammatory drugs were randomized to receive upadacitinib 15 mg once daily or placebo. At week 14, patients who had been randomized to receive placebo were switched to upadacitinib, and all patients continued in the open-label extension and...