fig4

Figure 4. Calibration curves for predicting 1-, 3-, and 5-year OS. (A-F) Calibration curves for 1-year OS in the training cohort (A) and validation cohort (B); 3-year OS in the training cohort (C) and validation cohort (D); 5-year OS in the training cohort (E) and validation cohort (F). The dashed 45-degree line represents ideal prediction, and the solid line represents the performance of the nomogram. A closer fit to the dashed line indicates better calibration. OS: Overall survival.