1976 年 42 巻 3 号 p. 115-121
Intant mortality rates of Gif u Prefecture are higher than those of average values in all Japanese countries since in 1947 except of a few years. In this paper, therefore, were discussed the regional differences and their factors of infant mortality rates in order to find a clue decrease them in Gifu Prefecture. The results obtained were as follows: 1. The regional differences of infant mortality rates are recognized when the data from mean values of five years (1968-1972) in Gifu Prefecture were analyzed by each rural and urban. 2. Infant mortality rates were negatively correlated with the numbers of beds, physicians per population and were negatively correlated with proportions of the hygienic costs, the numbers of persons aged 15-64 and persons graduated from universities. Infant mortality rates were positively correlated with proportions of the numbers of third or more live birth, the unmbers of people engaged in the primary industries, the numbers of livelyhood assistant household and with the persons of family per one household. 3. There is a significant correlation between one and another variable which are correlated with infant mortality rates. The partial correlation coefficient which was calculated in this paper showed that infant mortality rates were negatively correlated with the numbers of beds per population and positively correlated with proportions of people engaged in the primary industries.