Prediction value of the nomogram
The linear predictor of each patient (the scores of each patient) was calculated from the nomogram and the cutoff value was determined as 10 using the ROC method. A statistically significant difference in RFS between the high‐risk group (score < 10) and low‐risk population (score ≥ 10) was observed in the training cohorts (Kaplan–Meier curves of recurrence‐free survival (RFS). Stratified by the nomogram in the training (left) and validation (right) cohorts.