Body Composition Changes and Factors Influencing the Total Weight Loss Rate After Laparoscopic Sleeve Gastrectomy

Abstract

Objectives: While the effectiveness of metabolic/bariatric surgery has been confirmed, understanding the factors associated with weight loss is paramount for providing guidance in postoperative treatment strategies. Here, we aimed to examine the factors associated with long-term maintenance of weight loss after laparoscopic sleeve gastrectomy (LSG). Methods: This prospective observational cohort included patients who underwent LSG at a single academic health center between January 2017 and June 2022. We examined their body composition using InBody 720 or 770 and analyzed the factors associated with the percentage of total weight loss (%TWL) for 24 months. Results: The median body mass index (BMI) was 38.8 (interquartile range [IQR]: 35.6–46.7) preoperatively, 32.7 kg/m2 (IQR: 28.2–38.7) at 12 months postoperatively, and 33.9 kg/m2 (IQR: 29.1–40.1) at 24 months postoperatively. The lowest BMI was observed at 12 months (p p = 0.003). However, BMI remained significantly lower at 24 months than preoperatively (p p p p Conclusions: The effects of LSG persisted for up to 24 months postoperatively. The SMM/FM ratio 12 months after LSG was associated with the rate of weight loss at 24 months.

Keywords

• bariatric surgery
• percentage of total weight loss
• skeletal muscle mass
• fat mass