Trends in mortality from ischemic heart disease, and the relationship

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  • HISAOKA TERUHIKO
    Division of Cardiology, Department of Internal Medicine, Juntendo University School of Medicine

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  • 虚血性心疾患の心不全修正後年齢調整死亡率の年次推移ならびに, 職業と急死との関連について
  • between occupation and sudden death in Japan
  • -日本病理剖検輯報を用いた研究-

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To clarify the accurate mortality of ischemic heart disease and the relationship between occupation and sudden death in Japan, we analyzed the autopsy records riegistered in the “Annual of Pathologically Autopsied Cases in Japan (1959-1989)”, in comparison with randomly selected non-sudden death cases as controls. The percentage of sudden death in the autopsied cases rewained relatively constant from 1959 (0.62%) to 1975 (0.54%). However, the rate rose in 1984 (1.06%) and continued to rise until 1989 (1.46%). The corrected age-adjusted mortality from ischemic heart disease, being approximately twice of the mortality reported on the Official Statistics, reached a maximum in 1979, decreased slightly in 1984 and rose again in 1989. The mean age of sudden death cases in each occupational group was low compared with that in the controls. A significant difference was recognized among those in transportation/communication and mining. The mortality among sudden death cases in transportation/communications or security rated aignificantly higher than that in control cases. In conclusion, the actual mortality from ischemic heart disease is possibly twice that indicated in the Official Statistics of Japan. Furthermore, occupational stress may play an important role in triggering sudden death among Japanese employes.

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