ROC curve of the prognostic model in the training and test cohorts. (A) ROC curve of the prognostic model for the training. The area under the curve (AUC) was 0.954 (95% CI, 0.910-0.998). (B) ROC curve of the prognostic model for the test cohort. The AUC was 0.942 (95% CI, 0.871-1.014).