Prevalence of dementia in a Japanese elderly population

Authors

  • H. Shibayama,

    Corresponding author
    1. Dept. of Psychiatry (Head: Prof. Y. Kasahara), and Dept. of Public Health (Head: Prof. S. Yamada), Nagoya University, School of Medicine, Nagoya, Japan
      M.D. Department of Psychiatry Nagoya University School of Medicine 65 Tsurumai, Showa-ku, Nagoya 466 Japan
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  • Y. Kasahara,

    1. Dept. of Psychiatry (Head: Prof. Y. Kasahara), and Dept. of Public Health (Head: Prof. S. Yamada), Nagoya University, School of Medicine, Nagoya, Japan
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  • H. Kobayashi

    1. Dept. of Psychiatry (Head: Prof. Y. Kasahara), and Dept. of Public Health (Head: Prof. S. Yamada), Nagoya University, School of Medicine, Nagoya, Japan
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M.D. Department of Psychiatry Nagoya University School of Medicine 65 Tsurumai, Showa-ku, Nagoya 466 Japan

Abstract

Abstract— The geriatric community study was conducted by the Aichi Prefecture (Japan) Project. The psychiatric epidemiological survey was conducted using a stratified random sampling method. 3106 community residents over the age of 65 years, randomly selected from the whole Aichi Prefecture of Japan, were inter viewed; 476 had suspected dementia. The second interviews and the neurologic examinations were carried out by psychiatrists. The prevalence of dementia was estimated to be 5.8% (moderate and severe, 2.2%; mild 3.6%) of the aged population in the community. Cerebrovascular dementia (CVD) or multi-infarct dementia (MID) was found in 2.8%, senile dementia of the Alzheimer type (SDAT) in 2.4%, and dementia due to other causes in 0.6%. CVD (MID) was diagnosed more frequently in men, and SDAT in women.

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