Parent-child Agreement on Health-Related Quality of Life in Children With Functional Constipation in Primary Care

Objective: Functional constipation (FC) has a major impact on the health-related quality of life (HRQoL) of children. The aim of this study was to evaluate parent-child agreement on HRQoL in children (8–17 years) with FC in primary care. Methods: Children diagnosed with FC by their clinician were eligible. HRQoL was measured with the Defecation Disorder List (DDL, score 0–100), and the EuroQol-5-Dimension-Youth Visual Analogue Scale (EQ-5D-Y-VAS, scale 0–100). Parent-child agreement was examined with discrepancy scores, intraclass correlation coefficients and Bland-Altman plots. Results: Fifty-six children, median age of 10 years (IQR 8–12) and their parents were included. Parent-child agreement at a group level was good, with an intraclass correlation coefficient of 0.80 (95% confidence interval 0.67 to 0.88) for the DDL, and 0.78 (95% confidence interval 0.65 to 0.87) for the EQ-5D-Y-VAS. Mean discrepancy scores for the DDL and EQ-5D-Y-VAS were small: −2.6 and −2.9, implying that parents were slightly more positive about the HRQoL than their children. Bland-Altman plots showed considerable discordance between individual parent-child pairs. Limits of agreement were −19.7 and 14.6 for the DDL and −27.6 and 21.8 for the EQ-5D-Y-VAS. Conclusions: There is good parent-child agreement on HRQoL in children with FC at group level. However, a substantial number of parent-child pairs differed considerably on their rating of the HRQoL of the child. Therefore, we recommend clinicians, if they want to have an impression of the impact of the FC on the HRQoL of the child, to ask both the child and the parent(s).

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