title: The new questionnaire health-related quality of life for eating disorders showed good validity and reliability.
abstract: OBJECTIVE
  To describe the development and investigate the psychometric properties of a new instrument to measure health-related quality of life (HRQoL) for individuals with an eating disorder (ED).
  
  
  METHODS
  Seven focus groups were convened and an extensive literature review was carried out to generate the items. The first draft of the questionnaire was pilot tested. Three hundred twenty-four ED patients took part in the final field study. The 12-Item Short Form Health Survey, the Eating Attitudes Test-26, and two items from the Eating Disorders Inventory-2 also were applied to examine the concurrent validity. Factor analysis, item scale correlation correcting for overlap, test-retest, Cronbach's alpha coefficient, known-groups validation, and the sensitivity of the questionnaire in different populations also were examined.
  
  
  RESULTS
  The final Health-Related Quality of Life in Eating Disorders (HeRQoLED) questionnaire consisted of 50 items. Principal axis factor analysis identified eight subscales. Concurrent validity showed correlations >.40 with the criteria measures. Excellent reliability and stability were obtained. The HeRQoLED was sensitive in discriminating both between known-different groups and from the general population.
  
  
  CONCLUSIONS
  The results provide evidence of the good psychometric properties of the new HeRQoLED questionnaire, except for one domain, which had to be eliminated.
authors.affiliation: Research Unit, Hospital de Galdakao, Barrio Labeaga s/n, Bizkaia, Spain, 48960. uinves3@hgda.osakidetza.net
authors.forename: Carlota
authors.initials: C
authors.lastname: Las Hayas
authors.forename: Jose M
authors.initials: JM
authors.lastname: Quintana
authors.forename: Angel
authors.initials: A
authors.lastname: Padierna
authors.forename: Amaia
authors.initials: A
authors.lastname: Bilbao
authors.forename: Pedro
authors.initials: P
authors.lastname: Muñoz
authors.forename: Arantza
authors.initials: A
authors.lastname: Madrazo
authors.forename: Begoña
authors.initials: B
authors.lastname: Urresti
authors.forename: E Francis
authors.initials: EF
authors.lastname: Cook
mesh_terms: D000328:Adult; D001290:Attitude; D016022:Case-Control Studies; D001068:Feeding and Eating Disorders / Q000523:psychology* / Q000628:therapy; D006801:Humans; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D018709:Statistics, Nonparametric; D011795:Surveys and Questionnaires; D016896:Treatment Outcome