In this project, we will implement, in a controlled fashion, and evaluate a comprehensive plan for treating patients with knee OA by primary care physicians in a managed care environment. Comprehensive care for knee OA will be guided by a procedure designed to introduce and reinforce (a) an array of nondrug, self-care procedures intended to combat joint pain and preserve function and (b) a stepped protocol for drug management of knee pain that minimizes the risk of adverse side effects of NSAIDs.