Nomograms validation
In the training cohort, the bootstrap C‐index of the nomogram was 0.666 (95% CI: 0.635–0.697) and 0.698 (95% CI: 0.665–0.731) of OS and PFS, respectively. Similar results were shown in the validation set, with C‐index 0.747 (95% CI: 0.708–0.786) and 0.727 (95% CI: 0.664–0.790) of OS and PFS, respectively. The calibration curves of 8, 12, and 24‐month OS and 6, 12, and 18‐month PFS probabilities in both training cohorts (Figures In the training cohort, time‐dependent ROC curves showed the area under the curve (AUC) value in predicting 8‐, 12‐, and 24‐month OS was 0.780, 0.779, and 0.693, respectively (Figure Time‐dependent ROC curves of OS at 8‐, 12‐, and 24‐month in the training cohort (A) and validation cohort (B).Time‐dependent ROC curves of PFS at 6‐, 12‐, and 18‐month in the training cohort (A) and validation cohort (B).The decision curve analysis (DCA) of the OS nomogram in the training cohort (A) and validation cohort (B).DCA of the PFS nomogram in the training cohort (A) and validation cohort (B).