Fig. 4

The receiver operating characteristic (ROC) curve for MWPPT%, HKA, PTS, and predictive model. The area under the curve (AUC) was 0.906(0.829–0.983) for MWPPT%, 0.703(0.574–0.832) for HKA, 0.740(0.621–0.860) for PTS and 0.949(0.912–0.986) for predictive model (95%CI). MWPPT%, the maximum wear point of the proximal tibia%; HKA, Hip–knee–ankle angle; PTS, posterior tibial slope; CI, confidence interval