Journal
NEUROEPIDEMIOLOGY
Volume 19, Issue 3, Pages 130-140Publisher
KARGER
DOI: 10.1159/000026248
Keywords
epidemiology; dementia; prevalence; recruitment; selection bias; community survey; elderly
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Recruitment procedures may exert a considerable influence on the outcome of health surveys in the elderly. Their impact on the prevalence of dementia will be measured in an epidemiological field study in a sample of 1,692 randomly selected individuals (75+), Face-to-face interviews were conducted using SIDAM (structured interview for the diagnosis of dementia of Alzheimer type, multiinfarct dementia and dementias of other etiology according to ICD-10 and DSM-III-R), furthermore, proxy interviews were per formed with relatives of fragile and functionally dependent individuals, Considering face-to-face interviews of community-dwelling individuals, a prevalence of moderate and severe dementia of 5.3% was found, When including information on respondents by proxy and institutionalized individuals, the prevalence rate increased to 6.3 and 10.5%, respectively, It will be argued that covering the whole population in question and ensuring high response rates are central issues to minimize selection bias, Copyright (C) 2000 S. Karger AG, Basel.
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