The author conducted mass examination of blood pressure in summer, autumn and winter, 1958. -1959, on 90% of residents above 20 years of age in an agricultural village in the rice-monoculture belt along the River Abukuma in southern Miyagi, where the death rate for cerebral apoplexy is relatively high, at the same time investigating the area of cultivated faineland the alimentary habit, the housing farility, the intestinal parasitism, the paid amount of local tax, the level of culture and frequency of pregnancy of the subject farming families and members, to study the influence of these factors on the blood-pressure niveau. The results obtained were as follows.
1. The mean systolic pressure was found to rise abruptly in the forties, among both sexes, but the curve of mean diastolic pressure did not show such aconspicuous kink.
2. Both the systolic and the diastolic blood pressure showed low value in summer and high value in winter.
3. The detection rate of hypertension was also low in summer and high in winter. The rate rose with advance in age, reaching 30 around 50 yeas of age.
4. The detection rate of hypotension was high in summer and low in winter.
5. No perceptible correlation could be established between the area of paddy field cultivated by the family and the blood pressure niveau of the members.
6. The relationship between the area of dry field and the blood pressure niveau wa s not definite, either, but it was found that the systolic pressure among females and the diastolic pressure among males in the families with small area of dry farms to cultivate tended to be higher than in those with dry farms of larger area.
7- No definite correlation could be established between the area of cultivated land per head and the blood pressure.
8. No definite correlation was observed between the blood pressure niveau and the consumption of staple food, but the systolic pressure among males alone showed positive correlation with the quantity of consumed miso (Soy-bean poste) soup.
9. The systolic pressure among both sexes was found higher in the subjects showing special liking or dislike to salt-pickled vegetables than in those without such partiality. The diagtolic pressure was found higher in the subjects with special predilection to such pickles, among both sexes, , but among males only, it was found higher in the subject with outspoken distaste for the pickles.
10. The blood prssure in general was higher in the subjects with preference for salty taste, than in the subjects liking sugary foods. The systolic pressure was lower in males with liking for sugary taste than in those with liking for pungent flavor, and in females with liking pungent dishes thaii in those preferring salty foods. The diastolic pressure was lower in males with predilection for sugary foods than in those preferring pungent flavor.
11. The systolic pressure among both sexes and the diastolic pressure among males alone was higher in sake-drinking subjects than among the non-drinkers.
12. Both the systolic and the diastolic pressure was lower in light smokers consuming less than 10 cigarettes daily than in the total non-smokers and the systolic pressure alone was lower in these light smokers than in the heavier smokers consuming more than 11 cigarettes a day, among - males. The relation between blood pressure and smoking was not definitely observable among females.
13. The systolic pressure among females alone was found negatively correlated with the presence of ceiling board in the bed-room.
14. Parasitism by hook-worms alone was fouud positively correlated with both the systolic and the diastolic pressure among females only. parasitism by round-worms in the intestine was not correlated with the blood pressure in any case.
15. Both the systolic as well as the diastolic pressure was found higher in high-spini. ted than in low-spirited subjects among males and vice versa among females.
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