Abstract:Objective To investigate the risk factors of postoperative infection in patients with early gastrointestinal carcinoma treated by endoscopic submucosal dissection (ESD).Methods The clinical data of patients diagnosed early gastrointestinal carcinoma treated by ESD from November 2018 to November 2021 were reviewed for retrospective analysis. 83 patients were included, and they were divided into postoperative non-infection group (n = 60) and postoperative infection group (n = 23) according to whether infection occurred after surgery. The risk factors of infection after ESD were analyzed by univariate analysis and multivariate Logistic regression analysis, and the risk prediction model of infection after ESD was established.Results The multivariate Logistic analysis showed that age (OR^ = 4.644, 95%CI: 1.087~19.843, P = 0.035) and intraoperative perforation (OR^ = 11.147, 95%CI:2.136~5.168, P = 0.004) were risk factors for infection after ESD in patients with early gastrointestinal carcinoma. Goodness of fit test: χ2 = 4.95, P = 0.763 (P > 0.05) and area under the curve (AUC) was 0.756 (95%CI: 0.636~0.875, P = 0.000), positive prediction rate was 62.2%, sensitivity was 69.6%, specificity was 76.7%, and the cut-off value was 0.303.Conclusion The age of patients with early gastrointestinal carcinoma and the occurrence of perforation during ESD are closely related to the occurrence of infection after ESD, and this model has good discrimination and calibration degree for patients liable to suffer postoperative infection, it is worthy of clinical application.