Stroke, Vol 21, 72-77, Copyright © 1990 by American Heart Association
S Kojima, T Omura, W Wakamatsu, M Kishi, T Yamazaki, M Iida and Y Komachi
The system of registering stroke patients was begun in 1963 in Ikawa Town,
Akita Prefecture, Japan. The town is located in the northeastern part of
the country and in 1975 had a population of 6,427. From 1975 to 1981, 109
patients who suffered their first stroke were registered and were monitored
for 5 years. The average annual incidence rates of stroke were 2.8 and 2.0
per 1,000 population in males and females, respectively. Mean age at stroke
onset was 63.3 and 71.4 years in males and females, respectively (p less
than 0.01). According to the clinical classification of stroke, 76 patients
suffered cerebral infarction, 21 cerebral bleeding, and six subarachnoid
hemorrhage; six strokes were unclassified. The survival rates were compared
by sex, age, and clinical stroke type using Cox's proportional hazards
model. The survival rate of female stroke patients was lower than that of
males, but not significantly so. The survival rate of stroke patients
greater than or equal to 65 years old was significantly lower (p less than
0.01) than that of younger patients. Moreover, the survival rate of
patients with cerebral bleeding was significantly lower (p less than 0.01)
than that of patients with cerebral infarction. In the analysis of
self-care among the survivors, performance of the activities of daily
living in older patients indicated significantly less independence (p less
than 0.01) in younger patients. Follow-up of new stroke cases showed that
age and clinical stroke type were significantly associated with survival
and that age was also related to disability of the survivors.
ARTICLES
Prognosis and disability of stroke patients after 5 years in Akita, Japan
Akita Prefectural Institute of Public Health, Japan.
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