Fig. 2

Receiver operating characteristic curves for vascular endothelial growth factor status prediction in the training group and the validation group. a In the training group, the area under the curve was 74.1%. At the optimal cutoff value (−0.356), the respective sensitivity, specificity, and accuracy values were 83.5, 58.7, and 71.3% (red dot). b In the validation set, the area under the curve was 70.2% and the optimal cutoff value (− 0.570) exhibited respective sensitivity, specificity, and accuracy values of 67.9, 70.6, and 72.3% (red dot). AUC, area under the curve