Fig. 3

The ROC curve and calibration curve of the nomogram in the derivation cohort. (A) The ROC curve of the nomogram, with an AUC of 0.866 with a sensitivity of 0.761 and specificity of 0.869. (B) The ROC curve of the nomogram after internal validation using 1000 bootstrap resamples, with an AUC of 0.866 with a sensitivity of 0.761 and specificity of 0.852. (C) The calibration curve of the nomogram. Both the apparent calibration curve and the bias-corrected calibration curve after 1000 bootstrap resamples demonstrated good agreement between prediction and observation