Preoperative inhibitory control predicts weight loss 1 year after bariatric surgery
Adaptive regulation of eating behaviors are partly dependent on executive functions (EF), and important for successful weight outcomes in bariatric surgery patients. Yet, we know little about the association between EF and dysfunctional eating habits, and how pre-operative EF affect weight loss following surgery. This study investigated the relationship between pre-surgery EF, and post-surgery weight loss in a sample of bariatric surgery patients at the Center for Morbid Obesity at Oslo University Hospital, Aker.
Publisert i Forskningspublikasjoner Mandag 4. oktober, 2021 - 17:02 | sist oppdatert Mandag 4. oktober, 2021 - 17:14
Forskere: Gro Walø-Syversen, Ingela Lundin-Kvalem, Jon Kristinson, Inger Eribe, Øyvind Rø, Cathrine Brunborg og Camilla Lindvall Dahlgren.
Abstract
Executive function (EF), particularly inhibitory control, has been associated with weight loss (WL) in behavioural WL treatment for obesity. Few studies have focused on the relationship between preoperative inhibitory control and post-operative WL following bariatric surgery, and the potential mediating role of maladaptive eating behaviours is unclear. The aim of this study was to investigate preoperative executive function as a predictor of WL at 1 year following bariatric surgery. Additionally, we aimed to explore the mediating role of postoperative compulsive grazing in the relationship between inhibitory control and WL. A prospective observational study in which participants completed neuropsychological testing 30 days before and 1 year following surgery. Participants were 80% female, with an average age of 41 years. Results showed that preoperative inhibitory control explained 8% of the variance in %TWL. Preoperative working memory was not significantly associated with %TWL. Postoperative compulsive grazing was significantly associated with %TWL but did not mediate the association between preoperative inhibitory control and %TWL. Our findings suggest that preoperative inhibitory control performance is a relevant predictor of postoperative WL, and that compulsive grazing is a maladaptive eating behaviour that warrants clinical attention after surgery.
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