Background: The comparative efficacy of bariatric surgical procedures for type 2 diabetes mellitus (T2DM) has not been completely elucidated. To investigate this question, we conduct a systematic review and network meta-analysis. Methods: The protocol followed preferred reporting items for systematic review and meta-analysis protocols (PRISMA-P) checklist. Two review authors will independently search the PubMed, Embase (Ovid), and the Cochrane Central Register of Controlled Trials databases. The primary outcome is T2DM remission. The secondary outcomes include BMI, HbA1c (%), and percentage excess weight loss (% EWL). Results from the network meta-analysis will be presented as summary relative effect sizes (WMD or RR) and relative 95% CIs for each possible pair of treatments. Outcomes will be combined based on different periods of follow-up (12 months, 36 months, and 60 months). Results: The results will provide useful information about the efficacy of bariatric surgical procedures in patients with T2DM. Conclusion: The findings of the study will be disseminated through peer-reviewed journal. INPLASY registration number: INPLASY202050053.
Background:The aim of this study is to find the better treatment for gastric cancer by comparing robotic gastrectomy, laparoscopic gastrectomy, and open gastrectomy using Bayesian network meta-analysis.Methods:We will search PubMed, Embase, and the Cochrane Library for eligible studies published before 1 September 2018. There will be no language restrictions. Randomized clinical trials that compare robotic gastrectomy, laparoscopic gastrectomy, or open gastrectomy for patients with gastric cancer will be included. The risk of bias of included studies will be assessed by the Cochrane Collaboration's tool for assessing risk of bias in randomized trial. The outcomes of the study include operation time, estimated blood loss, time of ambulation, times to first flatus, time of oral intake, hospitalization, and the occurrence of complication. If sufficient data is collected and adequate clinical homogeneity is established among studies, we will conduct pairwise meta-analyses and Bayesian network meta-analyses for all related outcome measures.Ethics and dissemination:The study does not involve human subjects and does not need ethical approval and patient consent. The results of the network meta-analysis will be disseminated in a peer-reviewed journal for publication.
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