Testing parent dyad interchangeability in the parent proxy-report of PedsQL (TM) 4.0: a differential item functioning analysis

摘要

In child-parent agreement studies in the field of paediatric health-related quality of life (HRQoL), little attention has been paid to the effect of gender in parental proxy rating of children's HRQoL. This study aims to test the potential interchangeability of parent dyads in reporting children's HRQoL on both item and scale levels of the PedsQL (TM) 4.0 instrument, using the approach of differential item functioning (DIF).