Preoperative blood markers and intra-abdominal infection after colorectal cancer resection

Figure 5 Nomogram of intra-abdominal infection in training and validation sets. A: Receiver operating characteristic (ROC) curve of the nomogram in the training set; B: Calibration curve of the nomogram in the training set; C: Decision curve analysis (DCA) curve of the nomogram in the training set; D: ROC curve of the nomogram in the validation set; E: Calibration curve of the nomogram in validation set; F: DCA curve of the nomogram in the validation set. NLR: Neutrophil-lymphocyte ratio; PLR: Platelet-lymphocyte ratio; SII: Systemic immune-inflammation index; CEA: Carcinoembryonic antigen; AUC: Area under the curve.