title: Testing the psychometric properties of Kidscreen-27 with Irish children of low socio-economic status.
abstract: Kidscreen-27 was developed as part of a cross-cultural European Union-funded project to standardise the measurement of children's health-related quality of life. Yet, research has reported mixed evidence for the hypothesised 5-factor model, and no confirmatory factor analysis (CFA) has been conducted on the instrument with children of low socio-economic status (SES) across Ireland (Northern and Republic).
  
  
  
  The data for this study were collected as part of a clustered randomised controlled trial. A total of 663 (347 male, 315 female) 8-9-year-old children (M = 8.74, SD = .50) of low SES took part. A 5- and modified 7-factor CFA models were specified using the maximum likelihood estimation. A nested Chi-square difference test was conducted to compare the fit of the models. Internal consistency and floor and ceiling effects were also examined.
  
  
  
  CFA found that the hypothesised 5-factor model was an unacceptable fit. However, the modified 7-factor model was supported. A nested Chi-square difference test confirmed that the fit of the 7-factor model was significantly better than that of the 5-factor model. Internal consistency was unacceptable for just one scale. Ceiling effects were present in all but one of the factors.
  
  
  
  Future research should apply the 7-factor model with children of low socio-economic status. Such efforts would help monitor the health status of the population.
authors.affiliation: Sport and Exercise Sciences Research Institute, Ulster University, Jordanstown, BT37 OQB, Northern Ireland, UK. shannon-s1@email.ulster.ac.uk.
authors.forename: Stephen
authors.initials: S
authors.lastname: Shannon
authors.affiliation: Sport and Exercise Sciences Research Institute, Ulster University, Jordanstown, BT37 OQB, Northern Ireland, UK.
authors.forename: Gavin
authors.initials: G
authors.lastname: Breslin
authors.affiliation: Sport and Exercise Sciences Research Institute, Ulster University, Jordanstown, BT37 OQB, Northern Ireland, UK.
authors.forename: Ben
authors.initials: B
authors.lastname: Fitzpatrick
authors.affiliation: School of Psychology, Queen's University Belfast, Belfast, BT9 5BN, Northern Ireland, UK.
authors.forename: Donncha
authors.initials: D
authors.lastname: Hanna
authors.affiliation: Sport and Exercise Sciences Research Institute, Ulster University, Jordanstown, BT37 OQB, Northern Ireland, UK.
authors.forename: Deirdre
authors.initials: D
authors.lastname: Brennan
mesh_terms: D002648:Child; D002662:Child Health Services; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007494:Ireland; D016013:Likelihood Functions; D008297:Male; D011203:Poverty; D011788:Quality of Life; D015203:Reproducibility of Results; D012923:Social Class
keywords: Children; Confirmatory factor analysis; Health-related quality of life; Socio-economic status