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Venous thromboembolic events after bariatric surgery: Protocol for a systematic review and meta-analysis

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journal contribution
submitted on 2023-10-11, 09:57 and posted on 2023-10-11, 11:22 authored by Walid El Ansari, Brijesh Sathian, Ayman El-Menyar


Considerably large numbers of bariatric surgery (BS) procedures are undertaken globally, and are projected to increase with the obesity epidemic. Venous thromboembolic events (VTE) comprise an important cause of postoperative morbidity and mortality after BS and an important issue with wide clinical and financial repercussions. Yet, a precise extent of the prevalence of VTE after BS for obesity and its mortality remains uncertain.

Methods and analysis

In order to respond to this knowledge gap, we will conduct a systematic review and meta-analysis of the prevalence of and mortality associated with VTE after BS. This protocol outlines the methodology that will be used and the search strategies and eligibility criteria that will be utilized to identify and select studies, as well as the method by which data from the selected studies will be extracted for analysis. PubMed, Cochrane Central Register of Controlled Trials (CENTRAL), WHO International Clinical Trials Registry Platform, Cochrane Library, MEDLINE, Scopus, and Google scholar will be searched from 01 January 1990 through 10th April 2020, for original studies written in English that provided prevalence estimates of VTE after BS. Articles will also be searched for mortality estimates of VTE after BS. STROCSS (Strengthening the Reporting of Cohort Studies in Surgery) criteria will evaluate the methodological quality of the selected studies. The use of fixed effect or random effects model will be subject to the findings of the statistical tests for heterogeneity. Publication bias will be visually estimated by inspecting the funnel plots. Pooled estimates will be computed. Th current protocol conforms to the Preferred Reporting Items for Systematic reviews and Meta-Analysis (PRISMA) guidelines and has been submitted to the PROSPERO International Prospective Register of systematic reviews. No ethical clearance is required for this study. This systematic review and meta-analysis will be published in a peer-reviewed journal and presented at national and international conferences.


  • Venous Thromboembolic Events after Bariatric Surgery.
  • This protocol undertakes a systematic review and metanalysis of venous thromboembolic events after bariatric surgery.
  • Methodology, searches, eligibility, and data extraction for analysis are described.
  • Following the PRISMA guidelines, it describes the approach for pooled estimates.
  • Findings will have key clinical consequences for patient care.

Other Information

Published in: International Journal of Surgery Protocols
See article on publisher's website:


Open Access funding provided by the Qatar National Library



  • English



Publication Year

  • 2020

License statement

This Item is licensed under the Creative Commons Attribution 4.0 International License

Institution affiliated with

  • Hamad Medical Corporation
  • Hamad General Hospital - HMC
  • Qatar University
  • Qatar University Health - QU
  • College of Medicine - QU HEALTH
  • Weill Cornell Medicine - Qatar

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