Fig. 3

Predictive performance of the preoperative DGF prediction nomogram. (A) and (B) show the ROC curves of the nomogram in the development and validation cohorts, respectively. (C) and (D) present the calibration curves of the nomogram in the development and validation cohort, respectively. The calibration curve shows the calibration of the nomogram in terms of the agreement between the predicted risk of DGF and the observed risk of DGF. The 45° dotted line represents a perfect prediction, and the solid line represents the predictive performance of the nomogram. The solid line shows a closer fit to the dotted line, which indicates better predictive accuracy of the nomogram