2024 Volume 6 Issue 2 Pages 83-89
Objective: To investigate changes in body composition and the causes of lean body mass loss at one month after minimally invasive gastrectomy.
Subjects and Methods: The subjects were 88 patients who underwent minimally invasive surgical gastrectomy from April 2021 to August 2022 and had their body composition measured preoperatively and postoperatively. The median percentage lean body mass loss of 2.4% at one month postoperatively was used as the cutoff to define groups with low (n = 46, ≤2.4%) and high (n = 42, >2.4%) lean body mass loss. Multiple regression analysis was performed with postoperative lean body mass loss as the dependent variable to examine factors affecting lean body mass loss.
Results: The percentage changes one month after surgery in the low and high lean body mass loss groups were –5.4% and –7.1% for body weight, and –16.3% and –13.9% for body fat amount. In multiple regression analysis, preoperative body fat percentage (p < 0.01) was identified as a significant variable.
Conclusion: Preoperative low body fat percentage was a significant risk factor for lean body mass loss at one month postoperatively and this factor requires preoperative intervention.
