Fig. 5From: Efficacy and safety of radiofrequency treatment for improving knee pain and function in knee osteoarthritis: a meta-analysis of randomized controlled trialsForest plots for the assessment of WOMAC index between the radiofrequency group and control group. At A 4Â weeks, B 12Â weeks, and C 24Â weeks. WOMAC, Western Ontario and McMaster Universities Arthritis Osteoarthritis Index; SD, standard deviation; CI, confidence intervalBack to article page