During a period of 5 years, from 1973 to 1977, the total cholesterol values of 6, 352 males, and 10, 417 females, over 10 years old was measured in fasting state, using autoanalyzer. Blood pressure was measured in the spinal position. The electrocardiogram was classified by the Minnesota Cord. The results are as followed.
1) The mean total cholesterol value in Okinawa, according to age and sex was significantly higher than that of mainland Japan.
2) The incidence rate of hypercholesterolemia is also significantly higher in Okinawa compared to mainland Japan, (Kyushu).
3) The total cholesterol level increased in relation to blood pressure and the degree of obesity.
4) The major cause of the higher incidence rate of hypercholesterolemia in Okinawa, compared with mainland Japan (Kyushu), is the difference of fat intake between the two areas.
5) The mean total cholesterol value in the groups with ischemic change in the electrocardiogram was significant higher than that of normal group.
