Prevalence of dementia in a Japanese elderly population

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 interviewed; 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.

Prevalence of dementia in the older Japanese‐Brazilian population

“…Alzheimer's disease is the major subtype in many Western countries, while VD has often been reported to be dominant in Japan. [3][4][5][6][7][8] However, some recent epidemiological studies in Japan found the same tendency towards more AD than VD as in Western countries. [9][10][11] Although the cause of AD is still unknown, genetic factors seem to play an important role in its etiology.…”

Prevalence of Dementia among the South Korean Population

“…0 3 % 로 남 성 에 서 보 다 높 게 관찰되었으나 85~90세에서는 여성과 남성 모두 0.6%로 비슷한 양상을 보였다 [17]. 아시아 지역에서 수행된 연구의 경우 과거에는 혈관성 치매가 알츠하이머 병보다 높다고 보고하였으나 [18], 최근에 수행된 연구에서는 혈관성 치매에 비해 알츠하이머병의 유병률이 1.5배 높은 것으로 보고하기도 하였다 [19]. …”

Prevalence of dementia in a rural nursing home population in Southern Germany

“…None of these studies reports on the rural population with dementia in Germany. Extrapolating from findings of other studies in Japan and Portugal, dementia may be more prevalent in rural as compared to urban settings 7,8 .…”

“…Globally, dementia may be more common in rural settings compared to non-urban settings 6 . An epidemiological study in Japan found a higher rate of dementia in a rural area compared to an urban area 7 . Another epidemiologic study of Portugal which investigated the prevalence of dementia and cognitive impairment in Northern Portugal rural and urban populations aged 55-79 years showed a higher prevalence of cognitive impairment and dementia in rural compared to urban populations 8 .…”