Fig. 4

Calibration curve of the radiomics nomogram in training data (A) and testing data (B). The calibration curve describes the alignment between the model predicted probability of advanced NPC and the observed advanced results. The Y-axis represents the actual rate of advanced NPC. The X-axis is the advanced risk of the prediction. The dotted line on the diagonal represents the precise prediction of the ideal model. The other dotted line represents the apparent performance of nomogram, and the solid line represents the bias-corrected performance of nomogram. The higher the fit between the solid line and the diagonal dotted line, the better the prediction