title: Psychometric properties of the Norwegian version of the Kidscreen-27 questionnaire.
abstract: BACKGROUND
  The Norwegian version of the Kidscreen-27, a measure of generic health-related quality of life, has not yet been validated. Thus, the aim of this study was to investigate the reliability and validity of the Norwegian Kidscreen-27, in 10 year-old children.
  
  
  METHODS
  The Kidscreen-27 consists of five domains and was validated in a cross-sectional study of 1085 school children (52.5 % boys). In addition a subsample of 56 children also had repeated measures in order to study test-retest reliability.
  
  
  RESULTS
  Cronbach's alpha values ranged from 0.73 to 0.83, while intraclass correlation values over time ranged from 0.71 to 0.81. The domains of physical well-being, psychological well-being and autonomy & parents improved over time (Ps < 0.05), while social support and school environment domains did not. Confirmatory factor analysis showed an acceptable overall model fit: X (2) = 707; df = 310; P <0.001, root mean squared error of approximation = 0.037, the comparative fit index = 0.96 and the Tucker-Lewis index = 0.95. All factor loading were > 0.40. The Kidscreen-27 domains were significantly associated with general life satisfaction as measured with the Cantrils Ladder (Spearman rank correlations ranged from 0.29 to 0.59, Ps < 0.05).
  
  
  CONCLUSIONS
  The Norwegian version of Kidscreen-27 has good reliability and validity.
authors.affiliation: Department of Health Studies, Sogn og Fjordane University College, Svanehaugvegen 1, 6812, Førde, Norway. johnra@hisf.no.|Centre of Health Research, Førde Hospital Trust, Førde, Norway. johnra@hisf.no.
authors.forename: John Roger
authors.initials: JR
authors.lastname: Andersen
authors.affiliation: Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway.
authors.forename: Gerd Karin
authors.initials: GK
authors.lastname: Natvig
authors.affiliation: Department of Health and Nursing Sciences, University of Agder, Kristiansand, Norway.
authors.forename: Kristin
authors.initials: K
authors.lastname: Haraldstad
authors.affiliation: Faculty of Teacher Education and Sport, Sogn og Fjordane University College, Sogndal, Norway.
authors.forename: Turid
authors.initials: T
authors.lastname: Skrede
authors.affiliation: Faculty of Teacher Education and Sport, Sogn og Fjordane University College, Sogndal, Norway.
authors.forename: Eivind
authors.initials: E
authors.lastname: Aadland
authors.affiliation: Centre of Health Research, Førde Hospital Trust, Førde, Norway.|Faculty of Teacher Education and Sport, Sogn og Fjordane University College, Sogndal, Norway.
authors.forename: Geir Kåre
authors.initials: GK
authors.lastname: Resaland
mesh_terms: D000328:Adult; D002648:Child; D003430:Cross-Sectional Studies; D005163:Factor Analysis, Statistical; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D008875:Middle Aged; D009664:Norway; D010290:Parents / Q000523:psychology*; D011594:Psychometrics / Q000295:instrumentation*; D011788:Quality of Life / Q000523:psychology*; D015203:Reproducibility of Results; D013334:Students / Q000523:psychology*; D011795:Surveys and Questionnaires
keywords: Children; Health-related quality of life; Kidscreen-27; Norway; Quality of life; Reliability; Validity