Abstract:Objective To systematically identify and analyze the risk factors for post endoscopic retrograde cholangiopancreatography pancreatitis (PEP).Methods Electronic databases, including CNKI, Wanfang, VIP, PubMed, Embase, Web of Science, and the Cochrane Library, were systematically searched from inception to June 2025 for studies investigating risk factors for PEP. Following literature screening and data extraction, a meta-analysis was performed using RevMan 5.4 software.Results A total of 53 retrospective studies (24 in English, 29 in Chinese), involving 81,129 patients were included. Meta-analysis demonstrated that the following factors were significantly associated with an increased risk of PEP: age < 60 years (OR^ = 1.54, 95%CI: 1.24 ~ 1.92), history of pancreatitis (OR^ = 3.21, 95%CI: 2.46 ~ 4.20), endoscopic sphincterotomy (EST) (OR^ = 1.42, 95%CI: 1.15 ~ 1.76), pancreatic duct opacification (OR^ = 3.07, 95%CI: 2.58 ~ 3.65), difficult biliary cannulation (OR^ = 3.04, 95%CI: 2.51 ~ 3.69), sphincter of Oddi dysfunction (SOD) (OR^ = 3.42, 95%CI: 2.58 ~ 4.54), intraoperative balloon dilation (OR^ = 1.61, 95%CI: 1.14 ~ 2.29), history of PEP (OR^ = 3.01, 95%CI: 1.43 ~ 6.34), and pancreatic duct stent placement (OR^ = 1.66, 95%CI: 1.17 ~ 2.35). In contrast, the male gender was identified as a protective factor (OR^ = 0.70, 95%CI: 0.63 ~ 0.78).Conclusion Female, age < 60 years, history of pancreatitis, EST, pancreatic duct opacification, SOD, intraoperative balloon dilation, difficult biliary cannulation, and a history of PEP and pancreatic duct stent placement are independent risk factors for PEP. They should be fully evaluated before the operation, and prevention should be strengthened after the operation to minimize the occurrence of PEP as much as possible.