null Maida Sewitch, PhD

Associate Investigator, RI-MUHC, 5252 de Maisonneuve site

Cancer Research Program

Centre for Outcomes Research and Evaluation

Associate Professor, Department of Medicine, Faculty of Medicine and Health Sciences, McGill University

Department of Medicine, Division of Gastroenterology, MUHC



colonoscopy • colorectal cancer • epidemiology • preventive health services • screening

Research Focus

My research focuses on gastroenterology diseases using clinical and population-based studies in Québec and Canada. My work has focused on adherence to guidelines in patient and physician populations and on the quality of colonoscopy services. My research activities address the utilization of preventive health services for colorectal cancer, the enhancement of methods in colorectal cancer screening research, the evaluation of the safety and quality of screening colonoscopy, the development of a national strategy for colorectal cancer screening and the development of an app to help patients prepare for colonoscopy. Ongoing funded projects include eliciting patient preferences for health care in inflammatory bowel disease and the development and validation of triage tools for gastroscopy and colonoscopy referrals.

Selected Publications

Click on Pubmed to see my current publications list

  • Sewitch MJ, Jiang M, Fon Sing M, Barkun A, Joseph L. (2014). Screening polypectomy rates below quality benchmarks: a prospective study. World Journal of Gastroenterology, 21;20(43):16300-5.

  • Carpentier S, Sharara N, Barkun A, El Ouali S, Martel M, Sewitch MJ. (2016). Pilot validation study: Canadian global rating scale for colonoscopy services. Canadian Journal of Gastroenterology & Hepatology, 2016:6982739.

  • Sewitch MJ, Azalgara VM, Sing MF. (2018). Screening indication associated with lower likelihood of minor adverse events in patients undergoing outpatient colonoscopy. Gastroenterology Nursing journal, 41(2);159-164.

  • Sewitch MJ, Fallone C, Ghali P, Lee G-E. (2019). What patients want in a smartphone app that supports colonoscopy preparation: a qualitative study to inform a user-centred smartphone app. Journal of Medical Internet Research Mhealth Uhealth, July 2 7(7):e12242.

  • El Bizri M, El Sheikh M, Lee GE, Sewitch MJ. (2021). Mobile health technologies supporting colonoscopy preparation: a systematic review and meta-analysis of randomized controlled trials. PLoS One, 16(3):e0248679.