Fig. 3

Validation of nomogram model for GEP-NENs distant metastasis. (A–D) ROC curves, calibration curves, and DCA curves for the training set, as well as comparisons of the ROC curves for various independent risk factors and the nomogram. (E–H) ROC curves, calibration curves, and DCA curves for the validation set, as well as comparisons of the ROC curves for various independent risk factors and the nomogram. (I–L) ROC curves, calibration curves, and DCA curves for the external validation set, as well as comparisons of the ROC curves for various independent risk factors and the nomogram.