Original Article
Parents were accurate proxy reporters of urgent pediatric asthma health services—a retrospective agreement analysis

https://doi.org/10.1016/j.jclinepi.2007.02.002Get rights and content

Abstract

Objective

To assess agreement between parents' proxy reports of children's respiratory-related health service use and administrative data.

Study Design and Setting

A retrospective analysis of statistical agreement between clinical and claims data for reports of physician visits, emergency department (ED) visits, and hospitalizations in 545 asthmatic children recruited from sites in the greater Toronto area was conducted. Health services use data were extracted from the Ontario Health Insurance Plan and Canadian Institute for Health Information databases for each child for the interval coinciding with the proxy report for each health service type.

Results

Agreement between administrative data and respondent reports (n = 545) was substantial for hospitalizations in the past year (κ = 0.80 [0.74, 0.86]), moderate for ED visits in the past year (κ = 0.60 [0.53, 0.67]), and slight for physician visits (κ = 0.13 [0.00, 0.27]) in the past 6 months. Income, parent's education, and child quality-of-life symptom scores did not affect agreement. Agreement for ED visits was significantly higher (P < 0.05) for children who had an asthma attack in the past 6 months (κ = 0.61 [0.54, 0.68]) compared to children who did not (κ = 0.25 [0.00, 0.59]).

Conclusion

Parents of asthmatic children are reliable reporters of their child's respiratory-related urgent health services utilization.

Introduction

Accurate health services utilization data are important for epidemiologic studies [1], health services research [2], and economic evaluations [3], and these data are often collected via self-reported questionnaires or interviews [4], [5]. Given the increased use and importance of these data, it is imperative that the validity of self-reports be assessed. Several studies have investigated the validity of patient reports of health service utilization for ambulatory, homecare, and emergency department (ED) visits and hospitalizations by comparing patient reports to a second source of data such as medical records or administrative databases. Many of these validation studies have focused on older populations [6], [7] and adult populations with chronic diseases such as asthma and cystic fibrosis [5], [8].

Epidemiologic studies of children's use of health services are relevant and important. Researchers have historically examined hospital admission rates as a marker for disease morbidity and to explore changes in morbidity over time. Due to children's cognitive and developmental limitations, studies investigating children's use of health service often rely on parent proxy reports. Few studies have investigated the validity of parent reports for health services utilization by their children [9], [10], [11], [12]. Moreover, no studies have investigated the validity of parent reports for children with a chronic childhood disease. The objective of this study was to assess agreement between parents' reports of children's respiratory-related health services utilization (outpatient physician visits, ED visits, and inpatient admissions) and administrative health insurance claims data for children with asthma.

Section snippets

Participants

Approval was granted by the Hospital for Sick Children and Brampton Memorial Hospital Research Ethics Boards. Written informed consent was provided by parents/guardians and participants 16 years or older. Assent was provided by younger participants.

Data were extracted from a completed study of the effect of drug plans on outcomes in asthmatic children. Participants/parents were recruited from clinics, EDs, and primary and specialist physicians' practices. Residents of Ontario aged 1–18 years

Sample characteristics

The 545 respondents who consented to participate had higher average incomes (CAD$62,866 vs. CAD$54,120, P < 0.0001) and were more educated (received degree/diploma, 62.5% vs. 47.2%, P < 0.0001) compared to nonconsenters. Demographic data for the 545 children were collected from 459 parent proxies (parent group) and 86 adolescents (adolescent group). The majority (91%) of parent respondents were mothers. Also, most (59%) of the 545 children were male, and less than 10 years of age (73%), with an

Discussion

Agreement between administrative data and respondent reports was substantial for inpatient admissions (κ = 0.80), moderate for ED visits (κ = 0.60), and slight for outpatient physician visits (κ = 0.13) according to the Landis and Koch [17] criteria. Although there was a trend toward higher agreement between reports and administrative data for groups with higher income, higher education, and better PAQLQ symptom control scores, the differences in kappa values were not statistically significantly

Acknowledgments

We would like to thank Don DeBoer and Steven Shi of the Institute for Clinical Evaluative Sciences and Dr. Min Su, Dr. Peter Bikangaga, Dr. Milton Gold, and Dr. Teresa To for their contributions to this project. Thanks to Sara Quirk for technical assistance.

This research was funded by an operating grant from the Canadian Institutes of Health Research (Grant #77437).

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