Development and validation of a predictive model for endoscopic improvement of Crohn's disease

Figure 4 Receiver operating characteristic curve and calibration curve for predicting endoscopic improvement during follow-up visits in the internal validation group. A: Receiver operating characteristic curve of the internal validation group for predicting endoscopic improvement during follow-up visits; B: Calibration curve of the internal validation group for predicting endoscopic improvement during follow-up visits. ROC: Receiver operating characteristic; AUC: Area under the curve.