Differences in Self-Rated Versus Parent Proxy-Rated Vision-Related Quality of Life and Functional Vision of Visually Impaired Children.
2021
Purpose To investigate disagreement between children's self-reported vision-related quality of life (VQoL) and functional vision (FV) and their parents’ proxy-reports. Design Cross-sectional study. Methods A total of 152 children aged 7-18 years with visual impairment (VI) (defined by the World Health Organization), and their parents, were recruited from 22 National Health Service (NHS) ophthalmology departments in the United Kingdom. Age-appropriate versions of 2 vision-specific instruments, capturing VQoL and FV, were administered to children alongside modified versions for completion by parents on behalf of their child (ie, parent proxy-report). Disagreement between self-report and parent proxy-report was examined using the Bland-Altman (BA) method and a threshold of disagreement based on 0.5 standard deviation. Disagreement was analyzed according to participants’ age, sex, and clinical characteristics, using logistic regression analyses. Results Children rated themselves as having better outcomes than their parents did, although parents both under- and overestimated their child's VQoL (mean score difference = 7.7). With each year of increasing age, there was a 1.18 (1.04-1.35) higher odds of children self-rating their VQoL better than their parents (P = .013). Although parents consistently underestimated their child's FV (mean score difference = -4.7), no characteristics were significantly associated with differences in disagreement. Conclusions Disagreement between child self-report on the impact of VI and their parents’ proxy-reports varies by age. This implies that self-report from children must remain the gold standard. Where self-reporting is not possible, parent proxy-reports may provide useful insights, but they must be interpreted with caution.
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