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Forest plot for pain relief at (A) 0 to 8 weeks and (B) 9 to 24 weeks. Compared with control treatment, intra-articular corticosteroid injections were more effective in reducing the pain score (P < .0001) at 0 to 8 weeks. However, there was no difference between the injection group and the control group at 9 to 24 weeks (P = .92). CI = intra-articular corticosteroid injection group, PLB = placebo group.
