Fig. 2

a Forest plots illustrating individual and pooled SMD for differences in T1rho and T2 relaxation time of medial femoral articular cartilage between healthy controls and participants at risk for knee OA. SMD = standardized mean difference, 95% CI = 95% confidence interval, ACL = anterior cruciate ligament, PCL = posterior cruciate ligament, ICRS=International Cartilage Repair Society, OAI=Osteoarthritis Initiative, OA = osteoarthritis, GE = General Electric, T = Tesla. b Forest plots illustrating individual and pooled SMD for differences in T1rho and T2 relaxation time of medial tibial articular cartilage between healthy controls and participants at risk for knee OA. SMD = standardized mean difference, 95% CI = 95% confidence interval, ACL = anterior cruciate ligament, PCL = posterior cruciate ligament, ICRS=International Cartilage Repair Society, OAI=Osteoarthritis Initiative, OA = osteoarthritis, GE = General Electric, T = Tesla