Fig. 4

ROC curves of the nomogram in predicting prognosis at the 1-, 3-, and 5-year points in the training cohort (a), internal validation cohort (b) and external validation cohort (c). The corresponding time-dependent AUCs were used to show the discrimination of the prognostic nomogram. The red line represents the ROC curve for the prognostic nomogram in predicting the prognosis at the 1-year point. The green line represents the ROC curve for the prognostic nomogram in predicting the prognosis at the 3-year point. The blue line represents the ROC curve for the prognostic nomogram in predicting the prognosis at the 5-year point