A supplemental study on the infant mortality figures in Kagoshima prefecture.

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Using the mortality statistics issued by the Kagoshima prefectural government, the relationships between infant, neonatal or early neonatal mortality rate for a 15-year period 1971 to 1985 and the sex ratio at birth, the indicators of selected socioeconomic conditions or the measures of some ionic concentrations in drinking water were examined among a total of 96 local authority areas (city, town or village). The following results were obtained. 1) Among the 96 local authority areas, the sex ratio at births was positively correlated to the mortality rates for male's early neonates, male's, female's or total neonates and female's infants, respectively. 2) The percentage of girls or boys who enter senior high schools was inversely correlated to each of the early neonatal, neonatal and infant mortality rates. However, this correlation was not significant for male's early neonatal mortality rate only. 3) The percentage of junior childbearings was inversely correlated to female's or total neonatal mortality rate while that of senior childbearings was positively correlated to male's infant mortality rate. 4) Of the 13 ionic concentrations in drinking water, only 3 ions were significantly correlated to early neonatal, neonatal or infant mortality rate, in that, Cl- was positively correlated to the mortality rates for female's and total neonates and female's infants, CO3-- negatively to total early neonatal mortality rate and Ca++-Na+ negatively to the mortality rates for female's or total neonates and female's infants. 5) Results of multiple regression analysis showed that the mortality rates for infants, neonates and early neonates were attributed to none of the 13 ionic concentrations in drinking water.

A supplemental study on the infant mortality figures in Kagoshima prefecture.

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