わが国の大都市における平均出生時体重の年次推移(単産,1969-1980年)

概要

論文の詳細を見る
The mean birth weights (MBW) of single births in the 10 largest cities (LC) in Japan; Tokyo, Sapporo, Yokohama, Kawasaki, Nagoya, Kyoto, Osaka, Kobe, Kitakyushu and Fukuoka, and in remaining areas in the same prefectures (RA); Tokyo, Hokkaido, Kanagawa, Aichi, Kyoto, Osaka, Hyogo an Fukuoka Prefectures, were calculated by sex in 1969-1980, using vital statistics of the Japanese government as a source.<BR>1) Excluding RA in Kyoto Prefecture, MBW in both LC and RA have shown a decrease in recent years. Though MBW in LC were higher than those in RA in the beginning of the observed period, the former decreased later and were lower than the latter, excluding the cities of Tokyo, Osaka, Kawasaki and Fukuoka. MBW in RA reached a maximum later than MBW in LC in the same prefectures and decreased later in the same manner as MBW in LC. MBW in LC in the metropolises of Tokyo and Osaka, which are the two largest cities in Japan, were lower than those in RA in the same metropolises throughout the observed period (Fig. 1).<BR>2) In almost all LC the secular changes in MBW had significant negative correlations with the secular changes in the mean age of the mothers, but such secular changes were not seen in the rate of the low-birth-weight infants (LBW) or in the mean birth order (Table 4).<BR>3) Areal differences of MBW among LC and among RA were recognized in the observed period (Table 2). The magnitude of these differences has decreased since 1973 (Table 3). This phenomenon (Fig. 2) was contrary to both prefectural and regional levels in Japan in our previous report (Ref. 2). This fact suggests that MBW in the different LC are gradually coming to resemble one another because of the similarities of social backgrounds.<BR>4) Investigating the areal differences of MBW among the LC group regarding LBW, there was significant negative correlation between MBW and LBW in LC in each year from 1973 to 1977, but there was no significant correlation after 1977 (Table 5, Fig. 3). This result suggests that the decrease of MBW in LC in recent years was due to something other than the factors following the increase of LBW.
日本衛生学会の論文

わが国の大都市における平均出生時体重の年次推移(単産,1969-1980年)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク