Abstract
Although bariatric surgery in patients over 65 years of age gives comparable results to treatment in the younger population, there are still controversies regarding the indications for surgery, risk assessment, and choice between different types of surgery. The study aimed to identify the factors contributing to weight loss success after bariatric surgery in patients over 65 years of age. This is a retrospective, multicenter cohort study of patients with obesity aged over 65 years undergoing primary laparoscopic bariatric surgery in the years 2008-2022. Data came from 11 bariatric centers. Patients were divided into two groups: responders (R) who achieved more than 50% EWL and nonresponders (NR) who achieved less than 50% EWL. Both groups were compared. Uni- and multivariate logistic regression was used to identify predictors of weight loss success. Out of 274 analyzed patients, the average BMI before surgery was 42.9kg/m 2 . The most common obesity-related diseases were hypertension (85.1%) and type 2 diabetes (53.3%). Sleeve gastrectomy was the most frequently performed procedure (85.4%). Uni- and multivariate logistic regression analysis confirmed preoperative BMI (OR=0.9, 95% CI: 0.82-0.98, P =0.02), duration of diabetes >10 years (OR=0.3, 95% CI: 0.09-0.82, P =0.02), balloon placement (OR=10.6, 95% CI: 1.33-84.83, P =0.03), time since first visit (OR=0.9, 95% CI: 0.84-0.99, P =0.04), preoperative weight loss (OR=0.9, 95% CI: 0.86-0.98, P =0.01), and OAGB (OR=15.7, 95% CI: 1.71-143.99, P =0.02) to have a significant impact on weight loss success 1 year after bariatric surgery. Patients with higher preoperative weight loss may have a poorer response to surgery. OAGB emerged as the most beneficial type of surgery in terms of weight loss. Intragastric balloon placement before surgery may be effective in patients above 65 years of age and may be considered as a two-stage approach.
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