ABSTRACT
Background
Helping patients determine which type of bariatric surgery, Roux-en-Y gastric bypass (RYGB) or vertical sleeve gastrectomy (VSG), may be the best treatment can be challenging. This study investigated psychological correlates and their influence on weight loss for patients who underwent RYGB or VSG.
Methods
Four hundred twenty-two patients (RYGB = 305; VSG = 117) completed screening questionnaires presurgery and underwent surgery between August 2012 and April 2015. Associations between demographics and questionnaires with percentage weight change were evaluated using multivariable linear regression models.
Results
Median age was 48 years and median BMI 45.3 kg/m2 presurgery. Median percentage changes in weight from baseline to years 1 and 2 follow-up were − 31.5% (range − 52.2 to − 9.2%) and − 31.2% (range − 50.0 to − 1.2%) for RYGB and 25.3% (range − 49.8 to − 4.7%) and − 23.3% (range − 58.9 to − 1.6%) for VSG, respectively. Linear regression models revealed that younger patients lost more weight than older patients at years 1 (RYGB p < 0.0001; VSG p = 0.0001) and 2 (RYGB p = 0.005; VSG p = 0.002). No psychological correlates were significantly associated with weight loss outcomes. Post hoc analyses comparing patients who had surgery to those in the same cohort who did not have surgery revealed significantly higher rates of depression (p < 0.001), anxiety (p < 0.001), binge eating (p = 0.003), night eating (p < 0.001), food addiction (p = 0.042), and lower self-efficacy (p < 0.001) among patients who did not have surgery.
Discussion
Patients who are psychologically higher functioning are more likely to complete the evaluation process and undergo bariatric surgery. For patients who had surgery, psychological correlates were not associated with weight loss outcome for either RYGB or VSG. Implications for surgical choice are discussed.
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Funding
This research was supported by an award from the Mayo Clinic Campus in the Florida Comprehensive Focused Research Team (grant number 90085012). The Research Team had no role in the study design; collection, analysis, and interpretation of the data; writing of the manuscript; or the decision to submit the paper for publication.
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The authors declare that they have no competing interests.
Statement of Informed Consent
All patients signed the medical center authorization for release of medical information for clinical research purposes prior to undergoing bariatric surgery. For this type of study, formal consent is not required.
Statement of Human and Animal Rights
The study was approved by the medical center institutional review board. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Ames, G.E., Heckman, M.G., Diehl, N.N. et al. Guiding Patients Toward the Appropriate Surgical Treatment for Obesity: Should Presurgery Psychological Correlates Influence Choice Between Roux-en-Y Gastric Bypass and Vertical Sleeve Gastrectomy?. OBES SURG 27, 2759–2767 (2017). https://doi.org/10.1007/s11695-017-2876-2
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DOI: https://doi.org/10.1007/s11695-017-2876-2