Hyaluronic Acid Injections for Knee Osteoarthritis

Patients with knee osteoarthritis often are treated with viscosupplementation (intra-articular injections of hyaluronic acid [HA]). HA injections are expensive, and their efficacy is controversial. In this meta-analysis, researchers identified randomized trials of viscosupplementation that had at least 4 weeks of follow-up and at least 30 patients per treatment group; …