© 1998 Oxford University Press
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The impact of multiple impairments on disability in community-dwelling older people
Northern Centre for Healthcare Research (NCH) and Department of Health Sciences
3Department of Social Psychiatry, University of Groningen Groningen, The Netherlands
1Institute of Gerontology, University of Michigan, Ann Arbor and Westat Inc. Rockville, MD, USA
2Califomia Medical Review Inc. San Francisco, CA, USA
G. I. J. M. Kempen, Department of Medical Sociology, Faculty of Health Sciences, Maastricht University, PO Box 616, 6200 MD Maastricht, The Netherlands. E-mail: g.kempen{at}medsoc.unimaas.nl
Introduction: we have tested the hypothesis that the co-occurrence of common impairments (motor and cognitive impairments, vision and hearing loss, depressive symptoms) of later life have exacerbating effects on disability [activities and instrumental activities of daily living, social and role function, (inactivity]. Method: data were drawn from a community-based sample of 624 people aged 57 and older. Results: motor impairments and depressive symptoms were associated with all disability measures, even when the effects of other impairments, age and gender were controlled. This indicates independent, predominant effects of motor impairments and depressive symptoms. Although several significant first-order interaction effects (indicating exacerbation) of impairments on disability were found, they were not very strong, but vision and hearing losses exacerbate the impact of the other impairments on disability.
Conclusions: impairments, particularly motor impairments and depressive symptoms, largely act solo, by main effects on disability. Only a few combinations including vision or hearing loss further exacerbate the effects of other impairments on disability.
Keywords: depression, disability, hearing impairment vision
Received October 20, 1997; accepted in revised form December 22, 1997.
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