Fig. 1From: Incidence of total hip and total knee replacements from the prospective epidemiologic risk factor study: considerations for event driven clinical trial designa) Age specific incidence rate of total hip replacement (THR) and total knee replacements (TKR). b) Age specific prevalence of THR and TKR. c) Kaplan-Meier estimates of the cumulative incidence and 95% CI of THR and TKR in the total cohort d) Kaplan-Meier estimates of the cumulative incidence and 95% CI of THR and TKR in with OA at BaselineBack to article page