caa a22 4500 606179984 CHVBK 20210128100803.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s11136-015-0931-9 doi (NATIONALLICENCE)springer-10.1007/s11136-015-0931-9 Testing parent dyad interchangeability in the parent proxy-report of PedsQL™ 4.0: a differential item functioning analysis [Elektronische Daten] [Marziyeh Doostfatemeh, Seyyed Ayatollahi, Peyman Jafari] Purpose: 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™ 4.0 instrument, using the approach of differential item functioning (DIF). Methods: The PedsQL™ 4.0 Generic Core Scales were completed by 576 father-and-mother dyads. A polytomous item response theory model, graded response model, was used to detect DIF across fathers and mothers. Result: Assessment at item level showed that fathers and mothers perceived the meaning of items of the PedsQL™ 4.0 consistently. Regarding the scale level, a moderate to high level of agreement was observed between mothers' and fathers' reports on all similar subscales. Although the significant mean score differences in total, physical and emotional functioning indicated that fathers gave higher scores to their children, the small effect size implied that this difference may not be practically meaningful. Conclusion: Our findings revealed that discrepancy in parent dyads in rating children's HRQoL is a "real” difference and not an artefact due to measurement non-invariance. Fathers were seen to have slightly different insights into their children, especially for emotional functioning, but overall the results were not all that different. This suggests that paternal proxy-reports can be included in studies along with maternal proxy-reports, and the two may be combined when looking at parent-child agreement. Parent-child agreement studies in Iran are not affected by parents' gender, and therefore, researchers may rely on the assumption of the interchangeability of fathers and mothers in these studies. Springer International Publishing Switzerland, 2015 Quality of life nationallicence Parent dyad nationallicence Differential item functioning nationallicence The PedsQL™ 4.0 nationallicence Doostfatemeh Marziyeh Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran aut Ayatollahi Seyyed Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran aut Jafari Peyman Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran aut Quality of Life Research Springer International Publishing 24/8(2015-08-01), 1939-1947 0962-9343 24:8<1939 2015 24 11136 https://doi.org/10.1007/s11136-015-0931-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11136-015-0931-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Doostfatemeh Marziyeh Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran aut NATIONALLICENCE 700 1- Ayatollahi Seyyed Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran aut NATIONALLICENCE 700 1- Jafari Peyman Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran aut NATIONALLICENCE 773 0- Quality of Life Research Springer International Publishing 24/8(2015-08-01), 1939-1947 0962-9343 24:8<1939 2015 24 11136