Kelli Edmiston, winner of the Best affiliate poster at Oxford

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Weight loss expectations of patients awaiting bariatric surgery
Kelli Edmiston, Evangelos Efthimiou, Paris Tekkis, Fionnuala Davison, Caroline Shannon, Gianluca Bonanomi
United Kingdom, Chelsea and Westminster Hospital, London

Background: This study aimed to investigate the weight loss expectations in patients awaiting bariatric surgery.

Methods: Data is collected prospectively on all patients referred for bariatric surgery. We completed a retrospective analysis of patient record cards. Patient’s expectations for weight loss following surgery were compared to expected weight loss for each procedure based on international data. Factors including age, gender, ethnicity, weight and BMI at assessment, previous dieting attempts, previous successful weight loss, sweet eating, binge eating, and surgery type were considered in our analysis.

Results: 731 dietetic assessments completed between October 2002 and October 2009. The majority were female (f 71%, m 29%). Overall, 71% of patients had unrealistic weight loss expectations. Multiple logistic regression analysis revealed no significant difference for age, race, BMI, comfort eating, self reported binge eating, number of previous diet attempts, successful previous weight loss attempts, or chosen surgical procedure. The only factor of significance for unrealistic weight loss expectation was female gender (p = 0.003). Univariate analysis revealed a trend towards significant difference for self-reported binge eaters and for patients awaiting gastric bypass procedures.

Conclusion: Our study supports the literature that the majority of patients overestimate the amount of weight they are likely to lose from surgery. Females are more likely than males to overestimate the weight loss they are likely to obtain from surgery. There is a slight trend for patients awaiting gastric bypass to overestimate the weight loss compared to those awaiting gastric banding. Pre-operative education of patients continues to be an essential area, including a focus on realistic expectations after surgery.