Fig. 3

Validation of the nomogram by calibration curves. a–c The calibration curves of the model for a 1-year, b 3-year and 5-year c overall survival in the training cohort. d–f The calibration curves of the model for d 1-year, e 3-year and 5-year f overall survival in the validation cohort. Y-axis indicated the actual survival probability and x-axis indicated the predicated survival probability. The grey line indicated that prediction agrees with actuality. Error bars represent 95% confidence intervals