The study consists of a 2-Week, randomized, double-blind, placebo-controlled period, followed by a 52-Week open-label phase treatment with anakinra. After the last dose of anakinra at Week 54, the safety will be evaluated at a Safety Follow-up visit i.e., at Week 58.~The primary endpoint will be evaluated at Week 2 visit. Patients will be randomly assigned to either anakinra or placebo for a period of 2 weeks.
A study to demonstrate efficacy and safety of anakinra in pediatric and adult Japanese patients with Still's disease (Systemic juvenile idiopathic arthritis [SJIA] and Adult-onset Still's disease [AOSD]).