Performance of the prediction model
The optimal cut-off value for the prediction model nearly was 140 to distinguish the presence or absence of MVI. At the cut-off value, the specificity, sensitivity, negative and positive predictive value were 77.25% 87.80%, 96.30% and 48.60% in the training cohort, and 71.02%, 65.15%, 91.60% and 29.70% in the validation cohort (Table 
Performance indexes for the nomogram prediction model
Decision curve analysis for the present model in the training cohort (