The characteristics of laboratory data of Kudaka islanders in Okinawa prefecture were reported. The outstanding characteristic was a surprisingly high percentage in abnormal blood urea nitrogen (BUN). This was as high as 45.6% in Kudaka Jima as contrasted to only 2.3% abnormal in Naha area in Okinawa main land. This was not the result of many elder people living in this island. The percentage of abnormal BUN in a city in the southern part of Okinawa main land was 23.4%, about half of Kudaka Jima, even though only the people of more than 65 years old were examined. Moreover, in any decade, even in the 30th decade, the percent abnormality in Kudaka Jima was higher than that of 65 years old or elder people in Itoman city. The reason for this high percentage in abnormal BUN was not clear at this time, but possible effects of latent kidney malfunction, quality of the water, and hereditary factor of Kudaka islanders were discussed.
The author had an opportunity to conduct a survey of health and illness conditions of the village people of Bodh Gaya in India. The method involved 1) visits to individual homes and 2) a survey of patients visiting the clinic (from September to December 1958). The following results were obtained. 1. Results of house-to-house visits 1) The highest class of people had the smallest number of unit family members, where the low-income groups of people had larger number of family members per household. 2) The marriage age of wife was 12.3 years of age among the working class people and 18.6 among the professional workers, management-level people. 3) The number of children born and the number of children that died were inversely corrected to social class. 4) Deaths at birth time occurred in all classes of the society although the rate varied among the classes. The prevalence of deaths among under social group caused by infectious diseases resulting from inferior environmental conditions and the higher incidence of respiratory diseases and digestive diseases coming from latent causes observed all classes of people. 2. Results of the survey of morbidity 1) From the latter half of October, the number of patients visiting the clinic sur passed 300 in a week. By age, close to 50% of the total were patients under age 10, and 15% were in there teens or above 40 years of age. By sex, number of male patients were more than those of female patients. 2) The patients of both sexes in all age groups were divided into a groups of patients suffering from respiratory diseases and skin diseases and into a group of patients suffering from digestive diseases and muscle diseases. The respiratory diseases and skin diseases were in a reverse correlation, and respiratory diseases keenly reflected weather changed. 3) The levels of maximum blood pressure of the villagers in Bodh Gaya indicated extremely lower values than those of the Japanese people.
The authors have reported in former studies that there were significant differences among regions in Japan regarding to amount of food consumed. In the next step they must have attention to situation of each regional block whose sampled households are not same as to residential location, i.e. urban and rural, occupation and economic status in terms of monthly expenditure for food. These attributes of household are important factors because they could have power over dietary behaviors of consumers, so that it is necessary to make clear how do they differ amounts of food-intake. For this purpose the authors estimated these influences in data of National Nutrition Survey Japan 1971. The results are following: 1) Amounts of consumed rice, wheat, fruit, vegetable which excludes green and yellow vegetable, meat and milk & its products differ significantly among the household types while there is little difference in the case of potato and seaweed. 2) The households from urban in residential location, salaried workers in occupation and higher class in the levels of monthly expenditure for food, consume larger amount of wheat, fruit, meat and milk & its products, which are categorized as “modern food” by the authors than households from rural, farmer and lower class. And the former groups of household consume less amount of rice which is categorized typically as “traditional food” than the later. Bean and fish which are also traditional foods, are same to the case of rice. 3) The differences among attributes of household in the nation-wide, exist almost samely in regional blocks, respectively. 4) Since a pattern of regional differences, in addition, are also found throughout in all categories of household, the authors suppose that there are real regional differences of food consumption, even if components of household sampled in each region are not same.
Perinatal mortality rates in Japan, show a decrease of 7.95 per 1000 births, from 1969 through 1976. The present study was undertaken to offer possible explanations for the decline of the perinatal mortality during this period. Observations were made, based on the annual changes during this period, in the proportion of deliveries and the perinatal mortality rates related to birth weight, gestational period, maternal age, birth order, single or multiple birth, sex, place of delivery, and delivery attendant. The following results were obtained from these observations: 1. A decrease in the proportion of low, birth-weight deliveries accounted for nearly one-third of the reduction in the perinatal mortality. 2. A decrease in the proportion of low, birth-weight deliveries, and of the proportion of deliveries with short gestational periods, accounted for about one-half of the decline in the mortality rate. 3. About 40 per cent of the reduction in the proportion of low-birth-weight deliveries was attributable to a decrease in the proportion of deliveries with short gestational periods.