Predictors of efficacy of ultrasound-guided intra-articular glucocorticoid injection in knee osteoarthritis: A prospective study.

Background: Intra-articular glucocorticoid injection (IAGI) is widely used for treatment of knee osteoarthritis (OA) flares. Response rates are generally around 70%. Several studies have tried to identify predictors of good response, but response to ultrasound (US)-guided injection has not yet been investigated.