Cited by 49Bariatric Surgery and OutcomesObesity, Physical Activity, DietPharmacology and Obesity Treatment

Impulsivity Predicts Weight Loss After Obesity Surgery

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Kulendran, Myutan, Borovoi, Leah, Purkayastha, Sanjay, Darzi, Ara, Vlaev, Ivo·2017·Surgery for Obesity and Related Diseases

Abstract

Objective There is evidence that executive function, and specifically inhibitory control, is related to obesity and eating behavior. The goal of this study was to determine whether personality traits and inhibitory control predict weight loss after bariatric procedures. Although the impressive weight reduction after bariatric surgery has been shown in short- and medium-term studies, the effect of personality traits on this reduction is uncertain. Specifically, the effect of impulsivity is still largely unknown.Setting Patients attending either a multidisciplinary information session or outpatient clinic at the Imperial Weight Management Centre were recruited with informed consent into the trial over a 4-month period from January to April 2013. Participants were invited to attend behavioral testing on an outpatient basis in a silent room invigilated by a single researcher.Methods Forty-five bariatric patients participated in the study (25 patients had a gastric bypass, with a mean BMI of 41.8 and age of 39.0 years; 20 had a sleeve gastrectomy, with a mean BMI of 47.2 and age of 49.0 years). All patients completed personality measures of impulsivity-Barratt's Impulsivity Scale, as well as behavioral measures of impulsivity-the stop-signal reaction-time (SSRT) task measuring inhibitory control and the temporal discounting task measuring reward processing. Those measures were examined in relation to weight loss 6 months after surgery.Results The surgical procedure and changes in the behavioral measure of inhibitory control (SSRT) were found to be significant predictors of reduction in body mass index (BMI) in patients undergoing bariatric surgery. The sleeve gastrectomy group found a reduction in BMI of 14.1%, which was significantly less than the 25% reduction in BMI in the gastric bypass group. The direction (parameter estimate) of the significant effect was positive for SSRT change, which indicates that pre- and postreduction in impulsivity predicts reduction in BMI.Conclusion Impulsivity measures predict weight reduction in patients undergoing bariatric surgery. This result has implications for predicting outcomes from surgical treatments of obesity.

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Crossref · 10.1016/j.soard.2016.12.031

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  • After bariatric surgery, patients who demonstrate the greatest reductions in impulsivity as measured by neuropsychologic testing before and after surgery also had the greatest reduction in BMI.

    “Moreover, there is evidence to suggest that after bariatric surgery, patients who demonstrate the greatest reductions in impulsivity as measured by neuropsychologic testing before and after bariatric surgery also had the greatest reduction in BMI (70).”

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Authors
Kulendran, M., Borovoi, L., Purkayastha, S., Darzi, A., & Vlaev, I.
Affiliations
  • Imperial College London (GB)
  • Open University of Israel (IL)
  • University of Warwick (GB)
Corresponding author
Vlaev, Ivo
Venue
Surgery for Obesity and Related Diseases
Publisher
Elsevier BV
Published
2017-06
Volume
13
Issue
6
Pages
1033-1040
ISSN
1550-7289 (ISSN-L)
OpenAlex
W2571355932
Cited by
49
References
68
Citations by year
2026: 5 · 2025: 6 · 2024: 2 · 2023: 1 · 2022: 5 · 2021: 7 · 2020: 6 · 2019: 9 · 2018: 6 · 2017: 2
FWCI
6.41
Type
journal article
Language
en
Open access
Locations
  • Surgery for Obesity and Related Diseases (publishedVersion)
  • PubMed (publishedVersion)
  • Spiral (Imperial College London) (submittedVersion, cc-by-nc-nd)
Funders
Engineering and Physical Sciences Research Council (EP/L023814/1)
Topics
  • Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
  • Health Sciences › Medicine › Pharmacology › Pharmacology and Obesity Treatment
Keywords
impulsivity, bariatric surgery
MeSH terms
Adult, Female, Gastrectomy, Humans, Impulsive Behavior, Male, Middle Aged, Obesity, Gastric Bypass, Weight Loss, Body Mass Index, Bariatric Surgery

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