Abstract:Objective To explore the effect of Helicobacter pylori (Hp) eradication to prevent the metachronous gastric cancer (MGC) for patients with early gastric cancer treated with endoscopic submucosal dissection (ESD).Methods Clinical data of 471 patients with early gastric cancer and precancerous lesions confirmed by postoperative pathology after ESD from January 2015 to May 2021 were retrospectively analyzed. According to the situation of Hp infection and eradication, patients were divided into three groups. The patients with Hp infection and successful eradication were enrolled into Hp successful eradication group, those without eradication or failed eradication were enrolled into Hp failed eradication group, those with Hp negative were enrolled into Hp negative group. And then the occurrence and risk factors of MGC after ESD among the three groups were statistically analyzed.Results MGC were detected in 39 (8.3%) in patients with early gastric cancer after ESD. Kaplan-Meier analysis showed that successful eradication of Hp significantly reduced the risk of MGC after ESD for early gastric cancer (χ2 = 52.47, P = 0.000), and the median follow-up time was 39.0 months. Cox multivariate analysis showed that Hp eradicated failed (HR^ = 4.884, 95%CI: 2.170~10.992, P = 0.000), age ≥ 60 (HR^ = 1.050, 95%CI: 1.006 ~ 1.096, P = 0.025) and alcohol consumption (HR^ = 3.629, 95%CI: 1.769 ~ 7.444, P = 0.000) were independent risk factors for MGC after ESD of early gastric cancer.Conclusion Effective eradication of Hp can reduce the risk of MGC after ESD in patients with early gastric cancer, age and alcohol consumption are independent influencing factors of MGC and postoperative management of patients can be strengthened based on the Internet to improve Hp eradication compliance and the formation of good living habits.