那覇市内某公立病院における過去10年間(1966∼1975年)の胎児発育曲線の推移について

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In this study we attempted to investigate the intrauterine growth curves in O. public hospital in Naha during the past ten years (1966-75), in comparison with those of A. private clinic in Naha and those reported in Japan and other various countries.1) Although the obstetric service in O. hospital was established in November 1962, the birth records and the list of births with a sufficient description for this study are available since January 1966. The minimum unit of the balance used in its delivery room is 1 gram.The number of single live births subjected to this study accounted for 6, 627 cases. The other 946 cases were excluded on account of the incomplete description on sex, parity, the commencing date of the L. M. P., or the estimated date of the delivery, and of multiple births, fetal deaths, early neonatal deaths or major congenital malformations (Table 1-2).2) In the preliminary investigation it was found that the trends in the mean birth weigh increased significantly during this period (1966-75), and therefore we made three kinds of the intrauterine growth curves (1966-70, 1971-75 and 1966-75), by computing the mean, standard deviation, 10, 25, 50, 75 and 90 percentiles of the birth weight by sex, parity (primiparous and multiparous groups) and gestational age in weeks. The mean birth weights of 1971-75 is about 45-80 grams higher than those of 1966-70, especially between 38-43 gestational weeks (Fig. 2, Table 5).3) The comparisons were made with the various intrauterine growth curves reported in Japan and from various countries (Table 11, Fig. 4). In comparison with the data of A. clinic in Naha during corresponding period, the intrauterine growth curves of O. hospital were about 50-60 grams lower at 39-40 gestational weeks. This was probably due to the differences in the distribution of the socio-economical classes of the mothers delivering in the two establishments in Naha. It is suggested that there may be some biases in the data Funakawa and Takano reported in 1976 (Ref. 4). In the international comparisons our data of the two establishments in Naha are situated between those in Taipei and in Great Britain, and is gradually approaching to that of Great Britain.4) Based on these results we emphasized the importance, at first, of the random sampling for the preparation of the national standards of the intrauterine growth curves, taking into consideration the differences in the mean birth weight by area (at the regional and prefectural level) and by obstetric establishment; and secondly, of further investigations on the national and international comparisons of intrauterine growth curves in order to clarify the significance of the “birth weight” as a community health indicator in public health.
日本衛生学会の論文

那覇市内某公立病院における過去10年間(1966∼1975年)の胎児発育曲線の推移について

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