Fig. 3From: The temporal effect of platelet-rich plasma on pain and physical function in the treatment of knee osteoarthritis: systematic review and meta-analysis of randomized controlled trialsForest plots investigating the effect of PRP on WOMAC pain subscores at 3, 6 and 12Â months compared with control. (IV, inverse variance; M-H, Mantel-Haenszel; CI, confidence interval)Back to article page