[Prevalence and incidence of dementia among nursing home residents and residents in homes for the aged in comparison to private homes].

Based on a representative epidemiological study on dementia, prevalence and incidence rates of institutionalized individuals aged 75 years and older in comparison to those living in private homes are presented. The study was conducted between 1997 and 1999. Core component assessing cognitive function was the SIDAM (Structured Interview for the diagnosis of Dementia of the Alzheimer type, Multi-infarct dementia and dementias of other etiology according to ICD-10 and DSM-III-R, DSM-IV). If cognitive testing with study participants was not possible (e.g., due to fragility, death before examination) proxy interviews were performed with relatives or staff using the CDR (Clinical Dementia Rating). Prevalence and incidence rates in institutions were four times higher than in private homes. A prevalence rate of dementia for institutionalized individuals 75+ according to DSM-III-R of 47.6% was found; the annual incidence rate was 17.2%. This high proportion of people with dementia in institutions requires the development of new concepts of care to meet the demands of this changing situation in residential and nursing homes.