Fig. 6

The calibration curve and ROC of the nomogram of EMVI (A + B) and local recurrence (C + D)

A + C: the x-axis represents the nomogram-predicted probability and the y-axis represented the actual probability of hEMVI and local recurrence. The perfect prediction corresponded to the 45° dotted line. The red solid line represents the entire cohort (n = 153), and the blue solid line was the bias-corrected value by bootstrapping (B = 1000 repetitions), indicating the observed nomogram performance. The calibration curve showed an evident relationship between the actual tag and the predicted tag. B: the area under the ROC curve of the nomogram for predicting hEMVI was 0.868, suggesting that the confidence level of the probability of EMVI predicted by this nomogram was 86.8%. D: the area under the ROC curve of the nomogram for predicting local recurrence was 0.827, suggesting that the confidence level of the probability of local recurrence predicted by this nomogram was 82.7%