Observations on the stroke mortaliy of persons insured by mutual insurance federation of agricultural cooperatives / 日本農村医学会雑誌

ABSTRACT

The population with life insurance by the organization amounted about to 18 millions in 1985. The incidence of stroke death was 0.36‰ in 1984 and 0.35‰ in 1985. The latter figure was corrected to the national population to ae 0.92‰(national stroke death 1.12‰). Stroke mortality was strongly dependent on the age. Sex differences were larger at 40 to 60 years of age and approach to 1.0 in the group over 70 years of age. According to the description on the death certificate, which was available in 4, 147 cases, the incidence of cerebral bleeding was 41%, cerebral thrombosis or embolism 27% and subarachnoidal hemorrhage 19%. Thirty percent of cases died within 24 hours from the onset of attacks and 25% within 1 month. Early death was frequent in cerebral hemorrhage and in younger cases. Out of 4, 147 cases above, 1, 655 cases had medical examination at the entry. They showed lower mortality rate than the corresponding age group of those without madical examination. Cases with high blood pressure at the entry showed shorter survival period and higher incidence of cerebral hemorrhage.