Differences in Body Composition in Patients with Obesity 1 Year After Roux-En-Y Gastric Bypass: Successful Vs. Unsuccessful Weight Loss
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The aim of this study is to compare the differences in body composition in patients with obesity with successful weight loss (SWL) and unsuccessful (USWL) 1 year after Roux-en-Y gastric bypass (RYGB).
We included 36 women and 22 men. After stratifying patients according with SWL (defined as ≥ 50% of excess weight loss), fat-free mass (FFM) and fat mass (FM) trajectories were analyzed in each group.
The %FM in SWL women (78%) was lower than USWL (36 vs. 44, p < 0.001). The %FM in SWL men (77%) was lower than USWL (27 vs. 38, p < 0.05). A lower %FM before surgery increased the probability of success (p < 0.05).
SWL patients have a lower %FM, and those with lower pre-surgical %FM are more likely to have SWL 1 year after RYGB.
KeywordsBody composition Roux-en-Y gastric bypass Success Weight loss Fat mass Follow-up
The authors would like to thank the patients and the personnel of the Obesity and Eating Disorders Clinic, the National Institute of Medical Sciences and Nutrition Salvador Zubirán for their hard work, cooperation, and help in this study, especially to Valeria Soto Fuentes, Ricardo Reynoso Mendoza, Denise Arcila Martínez, and Ruth Soriano Cortés.
Compliance with Ethical Standards
Conflict of Interest
The authors declare that they have no conflict of interest.
Informed Consent and Ethical Approvement
All procedures performed in the study were in accordance with the ethical standards of the Institutional Research Committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.
- 5.Fried M, Yumuk V, Oppert JM, et al. European Association for the study of obesity; International Federation for the surgery of obesity-European chapter. Interdisciplinary European guidelines on metabolic and bariatric surgery. Obes Facts. 2013;6(5):449–68. https://doi.org/10.1159/000355480. Epub 2013 Oct 11CrossRefPubMedPubMedCentralGoogle Scholar
- 6.Larrad Á, Sánchez-Cabezudo C. Indicadores de calidad en cirugía bariátrica y criterios de éxito a largo plazo. Cir Esp Madrid España. 2004;75(3):301–4.Google Scholar
- 10.Fajardo-Cevallos R, Lajous M, Gamino R, et al. Derivación gastroyeyunal laparoscópica en obesidad mórbida. Experiencia inicial en el INCMNSZ. Asociación Mexicana de Cirugía Endoscópica, A.C. 2001;2(3):127–33.Google Scholar
- 13.Gómez-Ambrosi J, Andrada P, Valentí V, et al. Dissociation of body mass index, excess weight loss and body fat percentage trajectories after 3 years of gastric bypass: relationship with metabolic outcomes. Int J Obes. 2017 Sep;41(9):1379–87. https://doi.org/10.1038/ijo.2017.134.CrossRefGoogle Scholar
- 16.Courcoulas AP, Christian NJ, Belle SH, et al. Longitudinal assessment of bariatric surgery (LABS) consortium. Weight change and health outcomes at 3 years after bariatric surgery among individuals with severe obesity. JAMA. 2013 Dec 11;310(22):2416–25. https://doi.org/10.1001/jama.2013.280928.PubMedPubMedCentralGoogle Scholar