Response to Nonsteroidal Anti-inflammatory Drugs in African Americans with Osteoarthritis of the Knee

Abstract

This 6-week, randomized, double-blind, parallel-group study compared the analgesic efficacy, tolerability and safety of celecoxib, naproxen and placebo in African Americans with osteoarthritis (OA) of the knee. A total of 322 patients aged ≥ 45 years with OA of the knee in a flare state received 200 mg celecoxib orally once daily, 500 mg naproxen orally twice daily or placebo for 6 weeks. The primary endpoint was change from baseline in the Patient's Assessment of Arthritis Pain. Celecoxib was as effective as naproxen in reducing OA pain. Similar efficacy was observed in many of the secondary outcome measures. Celecoxib was well tolerated and demonstrated favorable upper gastro-intestinal tolerability. Improvements in outcome measures were numerically greater in the active treatment groups compared with the placebo group, but did not reach statistical significance. Celecoxib was as effective as naproxen in relieving OA pain in African Americans and was well tolerated. Few significant differences were observed between active treatments and placebo, possibly because of a strong placebo effect.