ArticleHealth and quality of life outcomes2025
Rasch analysis of the self-reported PedsQL™ 4.0 Generic Core Scales by Australian children.
Article in Health and quality of life outcomes, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeThe Pediatric Quality of Life Inventory™ Version 4.0 Generic Core Scales (PedsQL GCS), comprising 23 items covering four subscales (physical, emotional, social, and school functioning), is a widely applied generic measure of childhood health-related quality of life (HRQoL). This study aimed to assess the psychometric performance of the self-reported Child version in an Australian general population of children using psychometric criteria based on Rasch measurement theory.
methodsTo minimise type I error, a random sample of n = 500 was drawn from 1,874 Australian children aged 11–12 years who participated in the Longitudinal Study of Australian Children and completed the PedsQL GCS Child self-report measure. The partial credit model was applied. The following properties were assessed: unidimensionality, model goodness of fit, model reliability, targeting, item fit, threshold ordering, differential item functioning (DIF), and local dependency.
resultsAreas of poor performance included: weak support for unidimensionality of school functioning subscale; only emotional functioning subscale showing sufficient model goodness of fit; poor targeting, suggesting that item thresholds are limited in discriminating HRQoL differences in this cohort; seven items showing disordered thresholds; and five pairs of items being locally dependent. Only two items showed poor fit, and there was no evidence of non-uniform DIF regarding sex and age.
conclusionNot all Rasch measurement criteria were satisfied by the PedsQL GCS Child self-report measure applied in Australian children. This Rasch-based psychometric evaluation identified potential areas of improvement that can complement the known conceptual, practical, and classical psychometric strengths of the PedsQL GCS.
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