Cross-validation study using item response theory: the health-related quality of life for eating disorders questionnaire-short version.
The Health-Related Quality of Life for Eating Disorder-Short questionnaire is one of the most suitable existing instruments for measuring quality of life in patients with eating disorders. The objective of the study was to evaluate its reliability, validity, and responsiveness in a cohort of 377 patients. A comprehensive validation process was performed, including confirmatory factor analysis and a graded response model, and assessments of reliability and responsiveness at 1 year of follow-up. The confirmatory factor analysis confirmed the two second-order latent traits, social maladjustment, and mental health and functionality. The graded response model results showed that all items were good for discriminating their respective latent traits. Cronbach's alpha coefficients were high, and responsiveness parameters showed moderate changes. In conclusion, this short questionnaire has good psychometric properties. Its simplicity and ease of application further enhance its acceptability and usefulness in clinical research and trials, as well as in routine practice.
Basurto University Hospital (Osakidetza), Bilbao, Bizkaia, Spain Health Service Research Network on Chronic Diseases, Bizkaia, Spain amaia.bilbaogonzalez@osakidetza.net.
Amaia
A
Bilbao
Health Service Research Network on Chronic Diseases, Bizkaia, Spain University of Deusto, Bilbao, Bizkaia, Spain.
Carlota
C
Las Hayas
Institut Hospital del Mar d'Investigacions Mèdiques, Barcelona, Spain CIBER Epidemiology and Public Health, Granada, Spain.
Carlos G
CG
Forero
Health Service Research Network on Chronic Diseases, Bizkaia, Spain Galdakao-Usansolo Hospital (Osakidetza), Galdakao, Bizkaia, Spain.
Angel
A
Padierna
Galdakao-Usansolo Hospital (Osakidetza), Galdakao, Bizkaia, Spain.
Josune
J
Martin
Health Service Research Network on Chronic Diseases, Bizkaia, Spain Galdakao-Usansolo Hospital (Osakidetza), Galdakao, Bizkaia, Spain.
José M
JM
Quintana
D000328:Adult; D001068:Feeding and Eating Disorders; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D011788:Quality of Life; D011795:Surveys and Questionnaires; D054928:Validation Studies as Topic
Health-Related Quality of Life for Eating Disorders–Short Questionnaire; eating disorders; graded response model; item response theory; reliability; responsiveness; validity