Prevalence of medically diagnosed dementia in a defined United States population

Using the centralized diagnostic data resource for the population of Rochester, Minnesota, we determined the prevalence of medically diagnosed dementia for this community. There were 289 individuals with dementia who were residing in Rochester on January 1, 1975:208 women and 81 men. The overall age-and sex-adjusted rates per 100,000 population were 342 for all dementias and 227 for Alzheimer's disease. Prevalence rates increased with age for both sexes. Limiting the denominator to persons ≥,65 years, age-adjusted rates per 100,000 population for men and women were 3,452 and 3,466 (or about 3.5%), respectively, for dementia and 2,007 and 2,675 (2.0 and 2.7%), respectively, for Alzheimer's disease.

[1]  M. Roth,et al.  Mental illness and hospital usage in the elderly: a random sample followed up. , 1970, Comprehensive psychiatry.

[2]  J. Fleiss.  Statistical methods for rates and proportions , 1974 .

[3]  T. R. Bollerup.  PREVALENCE OF MENTAL ILLNESS AMONG 70‐YEAR‐OLDS DOMICILED IN NINE COPENHAGEN SUBURBS , 1975, Acta psychiatrica Scandinavica.

[4]  G. Persson.  Prevalence of mental disorders in a 70‐year‐old urban population , 1980, Acta psychiatrica Scandinavica.

[5]  L. Kurland,et al.  The patient record in epidemiology. , 1981, Scientific American.

[6]  P. Mölsä,et al.  Epidemiology of dementia in a Finnish population , 1982, Acta neurologica Scandinavica.

[7]  A. J. Campbell,et al.  Dementia in old age and the need for services. , 1983, Age and ageing.

[8]  V. Lehtinen,et al.  Prevalence of severe dementia in Finland , 1985, Neurology.

[9]  M. Weissman,et al.  Psychiatric disorders (DSM‐III) and cognitive impairment among the elderly in a U.S. urban community , 1985, Acta psychiatrica Scandinavica.

[10]  D. Kay,et al.  Dementia and depression among the elderly living in the Hobart community: the effect of the diagnostic criteria on the prevalence rates , 1985, Psychological Medicine.

[11]  J. Lanke,et al.  Prevalence of age psychosis and mortality among age psychotics in the Lundby Study. Changes over time during a 25-year observation period. , 1985, Neuropsychobiology.

[12]  B. Schoenberg,et al.  Severe dementia. Prevalence and clinical features in a biracial US population. , 1985, Archives of neurology.

[13]  W. Rocca,et al.  Epidemiology of clinically diagnosed Alzheimer's disease , 1986, Annals of neurology.

[14]  H. Kobayashi,et al.  Prevalence of dementia in a Japanese elderly population , 1986, Acta psychiatrica Scandinavica.

[15]  E. Kokmen,et al.  Alzheimer's disease and other dementing illnesses in a defined united states population: Incidence rates and clinical features , 1987, Annals of neurology.

[16]  A. Afifi,et al.  Prevalence of Alzheimer's disease in a retirement community. , 1987, American journal of epidemiology.

[17]  B. Ineichen.  Measuring the Rising Tide , 1987, British Journal of Psychiatry.

[18]  E. Kokmen,et al.  Trends in incidence of dementing illness in Rochester, Minnesota, in three quinquennial periods, 1960–1974 , 1988, Neurology.