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

Figure 1 Study design flow chart. CD: Crohn's disease.

Figure 2 Nomogram construction of an endoscopic improvement prediction model for Crohn’s disease. The sum of the scores on each predictor, which predicts the probability that the endoscopic improvement will occur. ALB: Albumin; FIB: Fibrinogen.

Figure 3 Receiver operating characteristic curve and calibration curve for the training group, which predicts endoscopic improvement during follow-up visits. A: Receiver operating characteristic curve of the training group for predicting endoscopic improvement during follow-up visits; B: Calibration curve of the training group for predicting endoscopic improvement during follow-up visits. ROC: Receiver operating characteristic; AUC: Area under the curve.

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.

Figure 5 Receiver operating characteristic curve and calibration curve for external validation, which aimed to predict endoscopic improvement during follow-up visits. A: Receiver operating characteristic curve of the external validation group for predicting endoscopic improvement during follow-up visits; B: Calibration curve of the external validation group for predicting endoscopic improvement during follow-up visits. ROC: Receiver operating characteristic; AUC: Area under the curve.

Figure 6 Decision curve analysis curves. A: Training group; B: Internal validation group; E: External validation group.

Figure 7 Predicting endoscopic improvement during follow-up visits in patients who revisited within six months. A: Receiver operating characteristic curve; B: Calibration curve; C: Decision curve analysis curve. ROC: Receiver operating characteristic; AUC: Area under the curve.

Figure 8 Predicting endoscopic improvement during follow-up visits in patients who revisited within six months to one year. A: Receiver operating characteristic curve; B: Calibration curve; C: Decision curve analysis curve. ROC: Receiver operating characteristic; AUC: Area under the curve.

Figure 9 Predicting endoscopic improvement during follow-up visits in patients who revisited exceeding 1 year. A: Receiver operating characteristic curve; B: Calibration curve; C: Decision curve analysis curve. ROC: Receiver operating characteristic; AUC: Area under the curve.