title: Eating Disorder Examination Questionnaire (EDE-Q) in Norwegian Adults: Discrimination between Female Controls and Eating Disorder Patients.
abstract: OBJECTIVE
  To determine the optimal Eating Disorder Examination-Questionnaire (EDE-Q) global score to discriminate between female controls and patients by eating disorder (ED) diagnosis, body mass index (BMI) and age.
  
  
  METHODS
  A sample of 1845 control participants and 620 patients from specialty ED treatment centres.
  
  
  RESULTS
  Mean global EDE-Q was 4.00 [standard deviation (SD) = 1.32] for patients and 1.25 (SD = 1.10) for controls. Receiver operating characteristic analyses demonstrated an area under the curve of 0.93 (95% CI: 0.91-0.94), with an optimal cut-off score of 2.50 (sensitivity = 0.86; specificity = 0.86), ranging from 2.09 for anorexia nervosa, 2.62 for bulimia nervosa and 2.63 for ED otherwise not specified. Optimal cut-off scores also varied according to BMI, ranging from 1.62 (BMI ≤ 18.0 kg/m(2) ) to 3.26 (BMI ≥ 30 kg/m(2) ), with less variability for age, ranging inversely from 2.16 (>40 years) to 2.70 (<20 years).
  
  
  CONCLUSIONS
  The global EDE-Q score showed high discriminant validity, and findings illustrate the particular importance of considering BMI and diagnosis when applying cut-offs based upon the EDE-Q.
authors.affiliation: Regional Department of Eating Disorders, Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway.|Division of Mental Health and Addiction, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
authors.forename: Øyvind
authors.initials: Ø
authors.lastname: Rø
authors.affiliation: Regional Department of Eating Disorders, Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway.
authors.forename: Deborah L
authors.initials: DL
authors.lastname: Reas
authors.affiliation: Regional Department of Eating Disorders, Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway.
authors.forename: Kristin
authors.initials: K
authors.lastname: Stedal
mesh_terms: D000328:Adult; D000368:Aged; D000856:Anorexia Nervosa / Q000175:diagnosis / Q000523:psychology; D015992:Body Mass Index; D052018:Bulimia Nervosa / Q000175:diagnosis / Q000523:psychology; D016022:Case-Control Studies; D016002:Discriminant Analysis; D001068:Feeding and Eating Disorders / Q000175:diagnosis* / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009664:Norway; D011594:Psychometrics; D012372:ROC Curve; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires / Q000592:standards*
keywords: Eating Disorder Examination-Questionnaire; ROC analysis; assessment; cut-off score; discriminant validity