title: Eating disorder examination-questionnaire factor structure and construct validity in bariatric surgery candidates.
abstract: BACKGROUND
  The Eating Disorder Examination-Questionnaire (EDE-Q) is increasingly used in studies with bariatric surgery patients although little is known about psychometric properties of this self-report measure in this clinical group. The current study evaluated the factor structure and construct validity of the EDE-Q in bariatric surgery candidates.
  
  
  METHODS
  Participants were a consecutive series of 174 obese bariatric surgery candidates who completed the EDE-Q and a battery of behavioral and psychological measures.
  
  
  RESULTS
  Confirmatory factor analysis (CFA) revealed an inadequate fit for the original EDE-Q structure but revealed a good fit for an alternative structure suggested by recent research with obese samples. CFA supported a seven-item, three-factor structure; the three factors were interpreted as dietary restraint, shape/weight overvaluation, and body dissatisfaction. The three factors converged with other relevant collateral measures.
  
  
  CONCLUSIONS
  These factor analytic findings, which replicate recent findings from studies with diverse obese samples, demonstrated convergent validity. Implications of these findings for clinical assessment and research with bariatric surgery patients are discussed.
authors.affiliation: Department of Psychiatry, Yale University School of Medicine, 301 Cedar Street, New Haven, CT 06519, USA. carlos.grilo@yale.edu
authors.forename: Carlos M
authors.initials: CM
authors.lastname: Grilo
authors.forename: Kathryn E
authors.initials: KE
authors.lastname: Henderson
authors.forename: Robert L
authors.initials: RL
authors.lastname: Bell
authors.forename: Ross D
authors.initials: RD
authors.lastname: Crosby
mesh_terms: D000328:Adult; D001828:Body Image / Q000523:psychology*; D015992:Body Mass Index; D003430:Cross-Sectional Studies; D003863:Depression / Q000175:diagnosis / Q000523:psychology*; D001068:Feeding and Eating Disorders / Q000175:diagnosis / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000523:psychology* / Q000601:surgery; D018579:Patient Selection; D011594:Psychometrics; D015203:Reproducibility of Results; D012649:Self Concept; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires