Fig. 6

Nomogram calibration curve. A-C Nomogram calibration curves for 1, 3, and 5 years of OS in training, testing, and external validation sets. The horizontal axis represents the predicted survival probability of the model, and the vertical axis represents the actual observed survival probability. Each line represents the survival situation at each time point compared with the actual situation, and the most ideal line (diagonal line: gray). The vertical line corresponding to each line's point represents that position's confidence interval. The blue cross on each line represents the result of each point after hierarchical Kaplan Meier correction