Psychometric properties of the Swedish PedsQL, Pediatric Quality of Life Inventory 4.0 generic core scales

Acta Paediatr. 2009 Sep;98(9):1504-12. doi: 10.1111/j.1651-2227.2009.01360.x. Epub 2009 Jun 30.


Aim: To study the psychometric performance of the Swedish version of the Pediatric Quality of Life Inventory (PedsQL) 4.0 generic core scales in a general child population in Sweden.

Methods: PedsQL forms were distributed to 2403 schoolchildren and 888 parents in two different school settings. Reliability and validity was studied for self-reports and proxy reports, full forms and short forms. Confirmatory factor analysis tested the factor structure and multigroup confirmatory factor analysis tested measurement invariance between boys and girls.

Results: Test-retest reliability was demonstrated for all scales and internal consistency reliability was shown with alpha value exceeding 0.70 for all scales but one (self-report short form: social functioning). Child-parent agreement was low to moderate. The four-factor structure of the PedsQL and factorial invariance across sex subgroups were confirmed for the self-report forms and for the proxy short form, while model fit indices suggested improvement of several proxy full-form scales.

Conclusion: The Swedish PedsQL 4.0 generic core scales are a reliable and valid tool for health-related quality of life (HRQoL) assessment in Swedish child populations. The proxy full form, however, should be used with caution. The study also support continued use of the PedsQL as a four-factor model, capable of revealing meaningful HRQoL differences between boys and girls.

Publication types

  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Adolescent
  • Chi-Square Distribution
  • Child
  • Factor Analysis, Statistical
  • Female
  • Health Status
  • Humans
  • Male
  • Parents
  • Pediatrics
  • Psychology, Adolescent / methods*
  • Psychology, Child / methods*
  • Psychometrics* / methods
  • Psychometrics* / statistics & numerical data
  • Quality of Life*
  • Reproducibility of Results
  • Self-Assessment
  • Sex Factors
  • Surveys and Questionnaires*
  • Sweden