7 randomized controlled trials (RCTs) were included in this meta-analysis comparing the effect of intra-articular hyaluronic acid (HA) injections and corticosteroids (CS) for the treatment of knee osteoarthritis (OA). Visual analog scale (VAS), Lequesne index, Knee Society Clinical Rating System (KSS), maximum flexion, and adverse events of treatments were measured. Analysis revealed that VAS scor...