Fig. 6. The diagonal lines (dotted) were standard curves, and the colored lines were calibration lines of prediction. When the calibration lines get closer to the standard lines, the nomogram would have greater prognostic potential. (A) The calibration curves of internal validation for 1- , 3- , 5-year probabilities of survival. (B) The calibration curves of external validation for 1- , 3- , 5-year probabilities of survival.
