Table 4.

Accuracy of the Nomogram Prediction Score in Predicting the Risk of Microvascular Invasion

Variable	Training Cohort	Validation Cohort
Area under the ROC curve	0.788	0.735
95% CI	0.744–0.831	0.668–0.802
Cut-off score	240	240
Sensitivity (%)	83.7%	74.5%
Specificity (%)	66.1%	66.7%
Positive predictive value (%)	68.8%	63.1%
Negative predictive value (%)	81.9%	77.4%
Positive likelihood ratio	2.5	2.2
Negative likelihood ratio	0.2	0.4

Abbreviations: ROC, receiver operating characteristic curve; CI, confidence interval.