Studies on the Epidemiological Relationship between Hypertensive and Cerebrovascular Disease Deaths

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  • MIYOSHI Tamotsu
    Department of Public Health, School of Medicine, Tokushima University

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  • 高血圧性疾患と脳血管疾患死亡の地理疫学的研究
  • コウケツアツセイ シッカン ト ノウ ケッカン シッカン シボウ ノ チリ エ
  • -The Characteristic of the Deaths in Kochi Prefecture-
  • ―高知県にみられる特徴―

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Abstract

Observation was made on the change of the standardized death rates of hypertensive and cerebrovascular diseases in Kochi Prefecture over a period of 14 years. As a result, the standardized death rate of hypertensive diseases showed a tendency to decrease with the years, although it increased in 1963, 1964, 1970, and 1971. That of cerebrovascular diseases showed a sudden increase in 1965-66 and remained at the increased level for the rest of the observation period. The rate was higher in the rural district consisting of towns and villages than in the urban district consisting of cities in all the years of this period. The average annual death for the 14 years' observation period was generally high in each city, town, or village where the standardized death rate of hypertensive diseases showed a considerably wide range of fluctuation. It was generally low in each city, town, or village where this rate showed a considerably narrow range of fluctuation. In general, the death rate of hypertensive disease was low in each city, town, or village where that of cerebrovascular diseases was high. The reversed relation was found in many cities, towns, and villages. When the death rates of both groups of diseases were examined for the change with the years, a reverse correlation was noticed in the death rate between both groups in a large number of cities, towns, and villages. When the death rates of both groups of diseases were compared between the urban and the rural districts of the prefecture, there was also a reverse correlation in the change with the years between them in each district.

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