Relationship of domain specific measures of health to perceived overall health among older subjects

The associations between nine domain-specific measures of health (e.g., depressive symptoms, psychological distress, mental health, physical functioning, role functioning, social functioning, bodily pain, somatic symptoms, and chronic medical morbidity) and a single-item measure for perceived overall health were studied in an extensive community-based sample of elderly persons (n = 5279). The results showed that: (1) the discriminative power of perceived overall health compared to domain-specific measures of health was moderate to large only at the fair/poor end of the perceived overall health spectrum; (2) a single-item measure of perceived overall health did not cover domain-specific measurements of health since only 41.8% of the variance in perceived overall health was explained by all domain-specific measures; and (3) the affective domains of functioning (psychological distress, mental health) were weakly related to perceived overall health. Bodily pain, chronic medical morbidity and, to a lesser extent, physical functioning were more strongly related to perceived overall health. These results were fairly consistent for men and women and for three age groups. We conclude that a global, single-item measure of perceived health and domain-specific health measures are not exchangeable in evaluation, survey, or epidemiological research. (C) 1998 Elsevier Science Inc

Economic valuation of informal care: lessons from the application of the opportunity costs and proxy good methods.

This paper reports the results of the application of the opportunity costs and proxy good methods to determine a monetary value of informal care. We developed a survey in which we asked informal caregivers in The Netherlands to indicate the different types of time forgone (paid work, unpaid work and leisure) in order to be able to provide care. Moreover, we asked informal caregivers how much time they spent on a list of 16 informal care tasks during the week before the interview. Data were obtained from surveys in two different populations: informal caregivers and their care recipients with stroke and with rheumatoid arthritis (RA). A total of 218 care recipients with stroke and their primary informal caregivers completed a survey as well as 147 caregivers and their care recipients with RA. The measurement of care according to both methods is more problematic compared to the valuation. This is especially the case for the opportunity costs method and for the housework part in the proxy good method. More precise guidelines are necessary for the consistent application of both methods in order to ensure comparability of results and of economic evaluations of health care