title: PedsQLTM 4.0 Generic Core Scales for adolescents in the Yoruba language: translation and general psychometric properties.
abstract: BACKGROUND
  Quality of life (QOL) is a universally accepted concept for measuring the impact of different aspects of life on general well-being. Adaptation of existing QOL instruments to local cultures has been identified as a better strategy than development of new ones.
  
  
  OBJECTIVE
  To translate and adapt the Paediatric Quality of Life Inventory™ Version 4.0 Generic Core Scales (PedsQL™) to the Yoruba language and culture and to test the psychometric properties of the adapted instrument among adolescents.
  
  
  METHODS
  Psychometric properties including internal consistency reliability, construct and factorial validity of the Yoruba version of PedsQL™ were evaluated using standard procedures.
  
  
  RESULTS
  The self report and proxy scales of the Yoruba PedsQL™ were developed with good cultural relevance and semantic/conceptual equivalence. Results from 527 adolescents revealed a Cronbach's coefficient which exceeded 0.7 for internal consistency reliability for all scores. The healthy subjects reported higher PedsQL™ scores than those with mental health and physical problems, which confirmed construct validity. Confirmatory factor analysis revealed a good model fit for the Psychosocial Health score, but not for the other measures.
  
  
  CONCLUSIONS
  The Yoruba PedsQL™ is culturally appropriate and with good internal consistency, reliability and construct validity. More work is needed regarding its factorial validity.
authors.affiliation: 1Department of Psychiatry, University College Hospital Ibadan, Nigeria.
authors.forename: Olayinka
authors.initials: O
authors.lastname: Atilola
authors.forename: Dejan
authors.initials: D
authors.lastname: Stevanović
mesh_terms: D000293:Adolescent; D003431:Cross-Cultural Comparison; D005163:Factor Analysis, Statistical; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008297:Male; D009549:Nigeria / Q000208:ethnology; D011594:Psychometrics / Q000295:instrumentation*; D011788:Quality of Life / Q000523:psychology*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards*
keywords: Adolescents; Nigeria; PedsQLTM; Yoruba; psychometrics; quality of life