Abstract:
BACKGROUND AND PURPOSE:Few studies are available that have addressed the prevalence of early-onset dementia (EOD), including early-onset Alzheimer disease and other forms of dementia in Japan. METHODS:A 2-step postal survey was sent to all of the 2475 institutions providing medical or care services for individuals with dementia in Japan's Ibaraki prefecture (population, 2 966 000) requesting information on EOD cases. Data were then reviewed and collated. RESULTS:We identified 617 subjects with EOD. The estimated prevalence of EOD in the target population was 42.3 per 100 000 (95% CI, 39.4 to 45.4). Of the illnesses that cause EOD, vascular dementia was the most frequent (42.5%) followed by Alzheimer disease (25.6%), head trauma (7.1%), dementia with Lewy bodies/Parkinson disease with dementia (6.2%), frontotemporal lobar degeneration (2.6%), and other causes (16.0%). CONCLUSIONS:The prevalence of EOD in Japan appeared to be similar to that in Western countries with the notable exception that vascular dementia was the most frequent cause of EOD in Japan.
journal_name
Strokejournal_title
Strokeauthors
Ikejima C,Yasuno F,Mizukami K,Sasaki M,Tanimukai S,Asada Tdoi
10.1161/STROKEAHA.108.542308subject
Has Abstractpub_date
2009-08-01 00:00:00pages
2709-14issue
8eissn
0039-2499issn
1524-4628pii
STROKEAHA.108.542308journal_volume
40pub_type
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