Fig. 4

Development and validation of prediction model. Nomogram for predicting early postoperative recurrence in patients with gastric cancer (A). Calibration curves of nomogram in training cohort (B) and verification cohort (C). The diagonal line represents the performance of ideal nomogram, and the solid line represents the consistency between the built nomogram and the actual nomogram. ROC curves of nomogram in the training cohort (D) and in the verification cohort (E). The area below the red line (AUC) represents the performance of nomogram