Fig. 3
Prediction accuracies of three indicators for the early diagnosis of KBD compared to the internal control group. Part a, part b, and part c showed the ROC curves and AUC of CTX-II, C2C, and PYD, respectively. Part d showed the comparison of ROC curves and AUC of CTX-II, C2C, and PYD, and AUC of CTX-II and C2C were sharply higher than PYD (PCTX-II vs PYD = 0.008, PC2C vs PYD = 0.013)