Background: The growing incidence of obesity has led to a proportionate rise in type 2 diabetes mellitus (T2DM) and its associated complications. We aimed to compare the long-term outcomes of Roux-en-y Gastric Bypass surgery (RYGB) and conventional medical management in T2DM obese patients.
Methods: PubMed, Google Scholar, and Clinicaltrial.gov were searched from inception to September 2023. Randomized Controlled Trials (RCTs) and cohort studies were included in this meta-analysis. The primary outcomes were the T2DM remission at 1, 2, 3, and 5 years and the accomplishment of the ADA composite triple treatment goal. The revised Cochrane risk of bias tool 2.0 and New-Castle Ottawa scale were used to assess the quality of the studies. This meta-analysis was registered prospectively on PROSPERO CRD42023466324.
Results: Of the 3,323 studies yielded from our initial search, 22 were included in this evidence analysis, with 5,176 total patients (1,984 and 3,192 patients in RYGB and conventional medical management groups). A significant increase in the accomplishment in the ADA's composite triple treatment goal was observed in RYGB group as compared to the conventional medical management group (RR 2.41, 95% CI 1.39-4.15, p-value 0.002, I2 35%). Diabetes remission was a clinically successful outcome after 1, 2, 3, and 5 years of the RYGB surgery in the patients (1 year; RR 4.74, 95%CI 2.46-9.12, p-value < 0.00001, I2 0%, 2 years; RR 8.95, 95% CI 1.71-46.71, p-value 0.009, I2 92%3 years; RR 18.18 95%CI 7.57-43.62, p-value < 0.00001, I2 0%, 5 years; RR 0.22, 95% CI 2.31-16.75, p-value 0.0003, I2 = 71%).
Conclusion: The pooled analysis of the given data concluded that the RYGB surgery was more effective in treating T2DM in patients than conventional medical management.
Supplementary information: The online version contains supplementary material available at 10.1007/s40200-024-01526-z.
Keywords: Conventional medical management; Meta-analysis; RYGB surgery; Type 2 Diabetes Mellitus.
© The Author(s), under exclusive licence to Tehran University of Medical Sciences 2025. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.