Allied health articlePreoperative eating behavior, postoperative dietary adherence, and weight loss after gastric bypass surgery
Section snippets
Participants
The study participants were 200 individuals who underwent Roux-en-Y gastric bypass surgery at the Hospital of the University of Pennsylvania from November 2001 to June 2004. The institutional review board of the University of Pennsylvania approved the study, and all participants provided informed consent before entering the study.
Measures
Approximately 4 weeks before surgery, the participants completed a psychosocial/behavioral evaluation to assess their appropriateness for surgery [20].
As a part of
Participants' characteristics
The demographic and descriptive variables are presented in Table 1. Most (n = 164, 82%) participants were women. The women had a mean preoperative age of 42.6 ± 9.9 years, weight of 139.4 ± 25.6 kg, and body mass index of 51.4 ± 9.0 kg/m2. The men (n = 36) had a mean preoperative age of 45.7 ± 9.4 years, weight of 181.3 ± 37.2 kg, and body mass index of 55.5 ± 10.0 kg/m2. Approximately 87% of all participants were European American, 9% were African American, and the remainder were of other
Discussion
The results of the present study add to a growing body of data on the characteristics associated with weight loss after bariatric surgery. Our participants lost approximately 25% of their preoperative body weight within the first 20 weeks of gastric bypass surgery. They lost another 10% during the next 20 weeks and almost 40% of their initial body weight by the second postoperative year. Of the potential predictor variables of interest investigated, gender, baseline cognitive restraint, and
Disclosures
The authors claim no commercial associations that might be a conflict of interest in relation to this article.
References (29)
- et al.
A review of psychosocial outcomes of surgery for morbid obesity
J Psychosom Res
(2002) - et al.
Weight loss with vertical banded gastroplasty and Roux-en-Y gastric bypass with selective vs. random assignment
Am J Surg
(1989) - et al.
Validation of a self-administered diet history questionnaire using multiple diet records
J Clin Epidemiol
(1990) - et al.
Can self-reported body weight be used to evaluate long-term follow-up of a weight loss program?
J Am Diet Assoc
(1987) - et al.
Trends in bariatric surgical procedures
JAMA
(2005) - et al.
Bariatric surgery: a systematic review and meta-analysis
JAMA
(2004) - et al.
Treatment of obesity I: adult obesity
- et al.
Does obesity surgery improve psychosocial functioning?A systematic review
Int J Obes Relat Metab Disord
(2003) - et al.
Psychosocial and behavioral aspects of bariatric surgery
Obes Res
(2005) - et al.
Psychological profile of the morbidly obese
Obes Surg
(2004)
Lifestyle, diabetes, and cardiovascular risk factors 10 years after bariatric surgery
N Engl J Med
Nonsurgical factors that influence the outcome of bariatric surgery
Psychosom Med
Binge eating disorder in extreme obesity
Int J Obes Relat Metab Disord
Binge Eating among gastric bypass patients: a long-term follow-up
Obes Res
Cited by (215)
Associations of adherence to physical activity and dietary recommendations with weight recurrence 1–5 years after metabolic and bariatric surgery
2024, Surgery for Obesity and Related DiseasesDiet and physical activity are associated with suboptimal weight loss and weight regain 10–15 years after Roux-en-Y gastric bypass: A cross-sectional study
2022, Obesity Research and Clinical PracticePreoperative weight loss is linked to improved mortality and leaks following elective bariatric surgery: an analysis of 548,597 patients from 2015–2018
2021, Surgery for Obesity and Related Diseases
Supported, in part, by the National Institute of Diabetes and Digestive and Kidney Diseases (grant K23-DK60023 to D. B. Sarwer and grant K24-DK065018 to T. A. Wadden).