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01-09-2014 | Uitgave 7/2014

Quality of Life Research 7/2014

The level of agreement between child self-reports and parent proxy-reports of health-related quality of life in boys with Duchenne muscular dystrophy

Tijdschrift:
Quality of Life Research > Uitgave 7/2014
Auteurs:
Yoonjeong Lim, Craig Velozo, Roxanna M. Bendixen

Abstract

Purpose

To investigate the level of agreement between child self-reports and parent proxy-reports of the health-related quality of life (HRQoL) in boys with Duchenne muscular dystrophy (DMD) using both classical test theory (CTT) and Rasch analysis.

Methods

A total of 63 boys with DMD and their parents completed the pediatric quality of life inventory version 4.0 child self-report and parent proxy-report of HRQoL, respectively. The data were analyzed using both the CTT (scale-score level) and Rasch analysis (item-level).

Results

The intraclass correlation coefficient (ICC, scale-score level) between children and parents showed good to moderate agreement, although parents consistently underestimated their child HRQoL. In Rasch analysis (item-level), 1 out of 8 items was significantly different between children and parents in the physical health scale. Also, 3 out of 15 items were significantly different between those two groups in the psychosocial health scale.

Conclusions

By applying both scale-score and item-level analyses, our study seeks to broaden the understanding of the discrepancy of the ratings between child self-reports and parent proxy-reports. The findings could provide further information about the decision-making process when selecting therapy and care programs.

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