Development of a Health-State Classification System for the Pediatric Quality-of-Life Inventory Version 4.0 Generic...

Area of Science:

• Health Economics and Outcomes Research
• Pediatric Health Measurement
• Psychometrics

Background:

• The Pediatric Quality-of-Life Inventory Version 4.0 Generic Core Scales (PedsQL GCS) is a comprehensive measure of childhood health-related quality of life.
• However, the PedsQL GCS does not provide health utilities necessary for cost-effectiveness analyses.
• There is a need for a shorter version suitable for utility derivation in Australia.

Purpose of the Study:

• To develop a reduced-item version of the PedsQL GCS.
• To create a measure amenable to health utility derivation.
• To inform cost-effectiveness decision-making in Australia.

Main Methods:

• Utilized data from two cohorts of the Longitudinal Study of Australian Children and the CheckPoint sample.
• Employed exploratory and confirmatory factor analyses for dimensionality assessment.
• Conducted psychometric analyses using Rasch and classical criteria, prioritizing item performance and conceptual relevance.

Main Results:

• Dimensionality assessments did not support an alternative empirical structure; analyses proceeded with the original 4 subscales.
• A 4-item set was selected: 'Get aches and pains' (physical), 'Feel sad/blue' (emotional), 'Other kids not friends' (social), and 'Keeping up with school work' (school).
• These items represent key domains of childhood functioning.

Conclusions:

• A concise 4-item PedsQL measure has been developed.
• This reduced set, pending further validation, can generate health utilities from the PedsQL GCS.
• The findings will support cost-effectiveness decision-making in pediatric healthcare in Australia.