title: [Reliability and validity of the Spanish version of the KIDSCREEN-52 for child and adolescent population].
abstract: OBJECTIVE
  This study assesses the reliability and validity of the KIDSCREEN-52, a new questionnaire of health-related quality of life (HRQoL), cross-culturally developed for children and adolescents in 13 European countries.
  
  
  METHODS
  The KIDSCREEN-52 was sent by post to a representative sample of the Spanish population aged 8-18 years old. Sociodemographic characteristics and other measures of HRQoL were collected. A health needs instrument was collected from parents. Psychome tric properties were assessed using the classical test theory, and item response theory approaches. Test-retest reliability was assessed in 10% of the sample 2-4 weeks later.
  
  
  RESULTS
  Response rate was 47% (n = 876). Cronbach's alpha values ranged from 0.74 to 0.86, and the intraclass correlation coefficient ranged between 0.55-0.79. Rasch analysis showed a good item-fit in each dimension (infit msq = 0.7-1.2). Confirmatory factor analysis confirms underlying structure of the 10 dimensions model (root mean square error of approximation [REMSEA] = 0.025; comparative fit index [CFI] = 0.94). KIDSCREEN scores were better in boys, in younger children, in those who did not report health care needs, and in those in the high socioeconomic level.
  
  
  CONCLUSIONS
  The KIDSCREEN-52 questionnaire has acceptable levels of reliability and validity for the Spanish population aged 8-18. Further work is needed to assess sensitivity to change and its applicability in clinical settings.
authors.affiliation: Agència d'Avaluació de Recerca i Tecnologia Mèdiques, Barcelona, España.
authors.forename: Cristian
authors.initials: C
authors.lastname: Tebe
authors.forename: Silvina
authors.initials: S
authors.lastname: Berra
authors.forename: Michael
authors.initials: M
authors.lastname: Herdman
authors.forename: Marta
authors.initials: M
authors.lastname: Aymerich
authors.forename: Jordi
authors.initials: J
authors.lastname: Alonso
authors.forename: Luis
authors.initials: L
authors.lastname: Rajmil
mesh_terms: D000293:Adolescent; D002648:Child; D003431:Cross-Cultural Comparison; D005240:Feasibility Studies; D005260:Female; D006304:Health Status; D006801:Humans; D007802:Language; D008297:Male; D010372:Pediatrics / Q000295:instrumentation*; D011788:Quality of Life / Q000523:psychology*; D013030:Spain; D011795:Surveys and Questionnaires