title: Eating disorder examination questionnaire: psychometric properties and norms for the Portuguese population.
abstract: OBJECTIVE
  The first aim of the current study was to establish general population norms for the Portuguese version of the Eating Disorder Examination Questionnaire (EDE-Q) in a large community sample of female adolescents and young women, as well, for a diverse Eating Disorder (ED) clinical sample, and for women with obesity without an ED. A second aim of the study was to assess the discriminant validity of the EDE-Q and providing cut-off scores for the total scale and subscales.
  
  
  METHODS
  A sample of female adolescents and young women (N = 4091) from the general population, 416 women who met diagnostic criteria for an ED and 138 women seeking obesity treatment completed the EDE-Q.
  
  
  RESULTS
  Norms for the EDE-Q global subscale were provided. Within the community sample, norms were provided for both high school and college samples. Receiver operating characteristic analysis showed that the EDE-Q total score accurately discriminate between participants with and without an ED. Current norm contributes to the clinical utility of the EDE-Q, providing both a cut-off score and reliable change index. Results showed that the EDE-Q is a reliable instrument, but the theorized four subscales structure was not supported by an explorative factor analysis.
  
  
  CONCLUSIONS
  Results will help both researchers and clinicians interpreting the EDE-Q scores and to establish comparison with data produced in different countries.
authors.affiliation: Psychotherapy and Psychopathology Research Unit, CIPsi, School of Psychology, University of Minho, Portugal.
authors.forename: Paulo P P
authors.initials: PP
authors.lastname: Machado
authors.forename: Carla
authors.initials: C
authors.lastname: Martins
authors.forename: Ana R
authors.initials: AR
authors.lastname: Vaz
authors.forename: Eva
authors.initials: E
authors.lastname: Conceição
authors.forename: Ana Pinto
authors.initials: AP
authors.lastname: Bastos
authors.forename: Sónia
authors.initials: S
authors.lastname: Gonçalves
mesh_terms: D000293:Adolescent; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005163:Factor Analysis, Statistical; D001068:Feeding and Eating Disorders / Q000175:diagnosis* / Q000523:psychology*; D005260:Female; D006801:Humans; D011159:Population Surveillance; D011174:Portugal; D011594:Psychometrics / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D012574:Schools; D011795:Surveys and Questionnaires; D014495:Universities
keywords: psychological testing; psychometrics