Changing Patterns in the Prevalence of Dementia in a Japanese Community: The Hisayama Study

We compared type-specific prevalences of dementia between two surveys of Hisayama residents ≥ 65 years old conducted in 1985 and 1992. The overall age-adjusted prevalence was greatly decreased from 5.4% in 1985 to 3.3% in 1992 for men, while it was changed little from 7.5 to 6.3% for women. The prev...

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Bibliographic Details
Published in:Gerontology (Basel) 1994-01, Vol.40 (Suppl 2), p.29-35
Main Authors: Kiyohara, Yutaka, Yoshitake, Taketo, Kato, Isao, Ohmura, Takao, Kawano, Hideo, Ueda, Kazuo, Fujishima, Masatoshi
Format: Article
Language:English
Subjects:
Age Distribution
Aged
Aged, 80 and over
Alzheimer Disease - epidemiology
Biological and medical sciences
Degenerative and inherited degenerative diseases of the nervous system. Leukodystrophies. Prion diseases
Dementia
Dementia - epidemiology
Dementia, Vascular - epidemiology
Female
Humans
Japan - epidemiology
Male
Medical sciences
Neurology
Prevalence
The Fifth Symposium by the 9 Winners of the Grants from Sandoz Foundation for
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Summary:We compared type-specific prevalences of dementia between two surveys of Hisayama residents ≥ 65 years old conducted in 1985 and 1992. The overall age-adjusted prevalence was greatly decreased from 5.4% in 1985 to 3.3% in 1992 for men, while it was changed little from 7.5 to 6.3% for women. The prevalence of vascular dementia (VD) decreased during the intervening 7 years in men but not in women. The prevalence of Alzheimer’s type (SDAT) was the same in either sex. The ratio of VD to SDAT prevalence was 1.8 in 1985 but fell to 1.1 in 1992. The background factors responsible for this change are discussed.
ISSN:0304-324X
1423-0003
DOI:10.1159/000213625