Despite increasing numbers of studies considering children's HRQL, information about variables contributing to parent-child agreement levels remains limited. Authors need to consistently provide evidence for reliability and validity of measures, and design studies to systematically investigate variables that impact on levels of parent-child agreement.
Aims-To identify currently available generic and disease specific measures of quality of life (QoL) for work with children; and make recommendations about the future development and application of QoL measures. Methods-Systematic searches were conducted to identify measures of QoL. Primary research papers were coded by the authors on the basis of predefined inclusion and exclusion criteria. Results-Of the 137 papers included in the review, 43 involved the development of a new measure. These included 19 generic and 24 disease specific measures. Almost half the measures were developed in the USA. Measures were identified which were appropriate for children across a broad age range, and included provision for completion by diVerent respondents (child only, parent only, or both). There were no clear distinctions between measures of QoL, health, or functional status. Conclusions-We have identified a small number of measures which fulfil basic requirements and could be used to assess QoL in clinical trials or following interventions. However, there remain a number of problems in measuring QoL in children. These include limited availability of disease specific measures; discrepancies between child and parent ratings; limited availability of measures for self completion by children; lack of precision regarding the content of domains of QoL; and the cultural appropriateness of measures developed elsewhere for children in the UK.
A systematic review was conducted to determine the relationship between ratings of children's health-related quality of life (HRQoL) made by parents and children. This was investigated in relation to four questions: is agreement greater for some domains (e.g. physical HRQoL) than others?; do parents perceive illness to have a greater impact than their child?; how is agreement affected by child age, gender and illness status?; and is the relationship between proxy ratings affected by the method of data collection? Fourteen studies were identified. Consistent with previous research, there was greater agreement for observable functioning (e.g. physical HRQoL), and less for non-observable functioning (e.g. emotional or social HRQoL). Three studies assessed whether parents perceive the illness to have a greater impact than their child, but no clear conclusions could be drawn given differences in measures used. Agreement is better between parents and chronically sick children compared with parents and their healthy children, but no effects were found for age or gender. All of these results may be dependent on the specific measure of HRQoL employed. There remain strong arguments for obtaining information from both parents and children whenever possible.
Health-related quality of life (HRQOL) is increasingly seen as important to reflect the impact of an illness and its treatment on a patient from the patient's perspective. However, there may be times when it is difficult to obtain this information directly from pediatric patients, and parents are therefore used as substitutes. Nevertheless, an informant discrepancy between children and their parents increase the need to identify variables which contribute to the observed differences between children's self-reports and parents' proxy-reports. Discrepancies between child and parent reports have often been regarded as "methodological error" and have led to misconceived arguments about who is "right." The aims of this review are to provide an overview and update to help understand the relation between children's self-report of their symptoms and HRQOL and parents' proxy-reports, the circumstances in which informant discrepancies might be expected, and potential reasons for these discrepancies. Discrepancies can be summarized in relation to characteristics of the child, the adult and the HRQOL domain being measured. We conclude that informant discrepancy is not simply an irritating measurement error, but also has its clinical implications. We argue that parents and children base their judgments of pediatric HRQOL on different information and as such, comprehensive evaluation needs to take account of both perspectives. This perspective has implications for the design of clinical trials and necessitates routine collection of data from both sources in clinical research and practice.
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