期刊
ACTA PSYCHIATRICA SCANDINAVICA
卷 122, 期 4, 页码 319-325出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1600-0447.2010.01587.x
关键词
dementia; Alzheimer's disease; vascular dementia; prevalence; secular trend
类别
资金
- Grants-in-Aid for Scientific Research [22700297] Funding Source: KAKEN
Objective: To examine secular trends in the prevalence of Alzheimer's disease (AD) and vascular dementia (VD) in a general Japanese population. Method: Four cross-sectional examinations were conducted among residents of a Japanese community aged >= 65 in 1985, 1992, 1998 and 2005. Results: The age- and sex-adjusted prevalence of all-cause dementia significantly increased with time (6.0% in 1985, 4.4% in 1992, 5.3% in 1998 and 8.3% in 2005; P for trend = 0.002). A similar trend was observed for AD (1.1%, 1.3%, 2.3% and 3.8% respectively; P for trend < 0.001), while the age- and sex-adjusted prevalence of VD and other/unclassified dementia showed J-shaped patterns (for VD: 2.3%, 1.5%, 1.5% and 2.5%, respectively, P for trend = 0.82; for other/unclassified dementia: 2.6%, 1.7%, 1.5% and 2.0%, P for trend = 0.26). The prevalence of AD was likely to increase with time from 1985 to 2005 among subjects aged 75 or older. The ratio of the prevalence of VD to that of AD decreased with time (2.1 in 1985, 1.2 in 1992, 0.7 in 1998 and 0.7 in 2005). Conclusion: Our findings suggest that the prevalence of all-cause dementia and AD significantly increased over the past two decades in the general Japanese population.
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