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- Title
Postoperative Resting Metabolic Rate and Successful Weight Loss After Roux-en-Y Gastric Bypass.
- Authors
Cardia, Lilian; de Cleva, Roberto; Ferreira, Leandro; Gadducci, Alexandre Vieira; Estabile, Priscila; Santos Silva, Paulo Roberto; Greve, Julia; Santo, Marco Aurelio
- Abstract
Objective: To analyze whether changes in RMR 6 months after RYGB could be a predictor of weight loss on late follow-up. Methods: Prospective study of 45 individuals submitted to RYGB in a university tertiary care hospital. Body composition was evaluated by bioelectrical impedance analysis and RMR by indirect calorimetry before (T0), 6 (T1), and 36 months (T2) after surgery. Results: RMR/day was lower in T1 (1.552 ± 275 kcal/day) than in T0 (1734 ± 372 kcal/day; p < 0.001) with a return to similar values at T2 (1.795 ± 396 kcal/day; p < 0.001). In T0, there was no correlation between RMR/kg and body composition. In T1, there was a negative correlation between RMR and BW, BMI, and % FM, and a positive correlation with % FFM. The results in T2 were similar to T1. There was a significant increase in RMR/kg between T0, T1, and T2 (13.6 ± 2.2 kcal/kg, 16.9 ± 2.7 kcal/kg, and 19.9 ± 3.4 kcal/kg) in the total group and according to gender. Eighty percent of the patients who had increased RMR/kg ≥ 2 kcal at T1 achieved > 50% EWL in T2, particularly in women (odds ratio: 27.09, p < 0.037). Conclusions: The increase in RMR/kg after RYGB is a major factor related to a satisfactory % excess weight loss on late follow-up.
- Subjects
WEIGHT loss; GASTRIC bypass; BODY composition; BIOELECTRIC impedance; ODDS ratio; TERTIARY care
- Publication
Obesity Surgery, 2023, Vol 33, Issue 4, p1178
- ISSN
0960-8923
- Publication type
Article
- DOI
10.1007/s11695-023-06498-2