Figure 1.Flowchart of the inclusion criteria. ERCP, endoscopic retrograde cholangiopancreatography.Table 1.Comparison of patient characteristics and ERCP outcomes between the development and validation cohorts.Table 2.Logistic regression analysis of predictive factors for PEP in the development cohort.Table 3.Patient distribution in terms of risk score and classification.Table 4.Goodness of fit of the risk score model.Figure 2.Example of the preprocedural PEP risk checklist. ERCP, endoscopic retrograde cholangiopancreatography. IPMN, intraductal papillary mucinous neoplasm; PEP, post-ERCP pancreatitis.