Figure 1

Participant disposition. Knees in intra-articular corticosteroid injection (IACI) group received treatment between T0 and T1. T-1, Baseline; T0, month 12; T1, month 24; T2, month 36; T3, month 48. IAHA, Intra-articular Hyaluronic Acid Injection; MRI, Magnetic Resonance Imaging; OAI, Osteoarthritis Initiative.