Fig. 5From: Serum hyaluronic acid concentration predicts the progression of joint space narrowing in normal knees and established knee osteoarthritis – a five-year prospective cohort studyReceiver operating characteristic (ROC) curves for serum hyaluronic acid (sHA) and progression of knee osteoarthritis from KL grades 2 or 3. AUC area under curve, Odds odds ratioBack to article page