The Impact of Psychiatric History and Peri-operative Psychological Distress on Weight Loss Outcomes 1 Year After Bariatric Surgery.

Background: To determine if self-reported baseline psychological distress moderates the association between lifetime psychiatric diagnosis and weight loss 1 year after bariatric surgery. An exploratory analysis assessed change in psychological distress from baseline on weight loss at 1 year.

Methods: A retrospective cohort study using data from the Ontario Bariatric Registry for all individuals undergoing surgery between January 1, 2012, and December 31, 2018, with a complete baseline psychological assessment and 1-year post-operative weight recorded (N = 11,159).