title: Compensatory eating disorder behaviors and gastric bypass surgery outcome.
abstract: OBJECTIVE
  This study prospectively examined the role of compensatory eating disorder behavior on gastric bypass (GB) surgery weight-loss outcome.
  
  
  METHODS
  The compensatory behaviors of 199 GB patients were evaluated presurgically using the Questionnaire of Eating and Weight Patterns. Hierarchical linear regression was used to assess the presence of compensatory behavior on 6-month postsurgery body mass index (BMI), and 1-year postsurgery BMI, controlling for age, sex, race, age becoming overweight, number of weeks postsurgery, and presurgery BMI.
  
  
  RESULTS
  The presence of presurgery compensatory behavior emerged as a small but significant predictor of lower BMI 6-months postsurgery although not at 1-year postsurgery. Other common predictors for lower BMI at 6-months and 1-year postsurgery were lower presurgery BMI and greater number of weeks postsurgery. Female sex also predicted lower BMI 1-year postsurgery.
  
  
  CONCLUSIONS
  These results must be taken with caution as they contradict clinical guidelines. Future research is needed to replicate these findings.
authors.affiliation: Eating and Weight Disorders Program, Department of Psychiatry and Behavioral Neuroscience, The University of Chicago, Chicago, Illinois, USA. chen@bsd.uchicago.edu
authors.forename: Eunice
authors.initials: E
authors.lastname: Chen
authors.forename: Megan
authors.initials: M
authors.lastname: Roehrig
authors.forename: Sylvia
authors.initials: S
authors.lastname: Herbozo
authors.forename: Michael S
authors.initials: MS
authors.lastname: McCloskey
authors.forename: James
authors.initials: J
authors.lastname: Roehrig
authors.forename: Hakeemah
authors.initials: H
authors.lastname: Cummings
authors.forename: John
authors.initials: J
authors.lastname: Alverdy
authors.forename: Daniel
authors.initials: D
authors.lastname: Le Grange
mesh_terms: D000328:Adult; D015992:Body Mass Index; D001068:Feeding and Eating Disorders / Q000150:complications / Q000453:epidemiology / Q000523:psychology*; D005260:Female; D015390:Gastric Bypass / Q000523:psychology; D006801:Humans; D016014:Linear Models; D008297:Male; D009767:Obesity, Morbid / Q000517:prevention & control / Q000523:psychology* / Q000601:surgery*; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012008:Recurrence; D012737:Sex Factors; D013997:Time Factors; D016896:Treatment Outcome; D015431:Weight Loss