A Longitudinal Analysis of Wait Times for Bariatric Surgery in a Publicly Funded, Regionalized Bariatric Care System

  • Aristithes G. Doumouras
  • Samantha Albacete
  • Aneetinder Mann
  • Scott Gmora
  • Mehran Anvari
  • Dennis HongEmail author
Original Contributions



Bariatric surgery is proven to be the most effective strategy for management of obesity and its related comorbidities. However, in Canada, patients awaiting bariatric surgery can be subjected to prolonged wait times, thereby subjecting them to increased morbidity and mortality, as well as decreased psychosocial well-being.


To assess the factors associated with prolonged wait times for bariatric surgery within a publicly funded, provincial bariatric network.


This was a retrospective population-based study of all patients aged > 18 years who were referred for bariatric surgery from April 2009 to May 2015 using linked administrative databases to capture patient demographic data, socioeconomic variables, healthcare utilization, and institutional factors. The main outcome of interest was a wait time greater than 18 months. Multivariate logistic regression modeling was used to estimate odds ratios (OR) and 95% confidence intervals (CI).


A total of 18,854 patients underwent bariatric surgery from April 2009 to December 2016, of which 2407 patients experienced wait times of > 18 months. On average, yearly wait times have increased for patients receiving surgery with wait times of 10.98 months (SD 5.48) in 2010 and 13.09 (SD 6.69) in 2016 (p < 0.001). Increasing age (OR 1.12, 95% CI 1.05–1.19, p = 0.0004), BMI (OR 1.08, 95% CI 1.04–1.11, p < 0.001), and male gender (OR 1.47, 95% CI 1.28–1.70, p < 0.001) were significantly associated with increased bariatric surgery wait times. Additionally, smoking status (OR 1.46, 95% CI 1.09–1.97, p = 0.0118) and obesity-related comorbidities particularly diabetes (OR 1.29, 95% CI 1.14–1.44, p < 0.001) and heart failure (OR 1.72, 95% CI 1.43–2.07, p < 0.001) were correlated with prolonged wait times for surgery. Socioeconomic variables including disability (OR 1.64, 95% CI 1.38–1.92, p < 0.001) and immigration status (OR 1.35, 95% 1.11–1.64, p = 0.003) were correlated with increased odds of longer wait times, as were regions with regionalized assessment and treatment centres (RATC) when referenced against centers of excellence (COEs) in number of days added with 20.45 (95% CI 13.20–27.70, p < 0.001).


Wait times for bariatric surgery in a publicly funded, regionalized bariatric program are influenced by certain patient characteristics, socioeconomic variables, and institutional factors. This warrants further intervention and study to help improve these inequities when encountering potentially vulnerable populations awaiting bariatric surgery.


Bariatric surgery Wait times Population health Health care access 



Parts of this material are based on data and information compiled and provided by the Canadian Institute for Health Information.

Funding Information

This study was supported by ICES, which is funded by an annual grant from the Ontario Ministry of Health and Long-Term Care (MOHLTC).

Compliance with Ethical Standards

The use of data in this project was authorized under section 45 of Ontario’s Personal Health Information Protection Act, which does not require review by a Research Ethics Board.

Conflict of Interest

The authors declare that they have no conflict of interest.


The analyses, conclusions, opinions, and statements expressed herein are solely those of the authors and do not reflect those of the funding or data sources; no endorsement is intended or should be inferred.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of SurgeryMcMaster UniversityHamiltonCanada
  2. 2.Division of General SurgerySt. Joseph’s HealthcareHamiltonCanada
  3. 3.Michael G. DeGroote School of MedicineMcMaster UniversityHamiltonCanada

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