成熟新生児の身体諸計測値

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This paper presents data on 27 anthropometric measurements of 310 single, matured newborn infants (160 males, 150 females) and their placental weight. They were obtained from July 1975 to June 1976 at a maternity hospital in Tokyo.Variables of the measurements are given in table 1.The mean, standard deviation and coefficient of variation for each variable were caluculated and the correlation coeficient matrix was composed. These data were applied to a principal components analysis.Results:1) The mean, S. D. and C. V. on 28 variables are given in table 2.2) Correlation coefficients between birth weight and placental weight are 0.369 in males and 0.497 in females.3) Cephalic indices are 82.99±4.58 in males and 83.34±4.34 in females.4) The correlation coefficient matrix among the 28 variables of newborn infants are given in table 3 (males lower left, females upper right). The highest correlation coefficients are 0.728 in males and 0.670 in females, and both are between girth of the upper arm and girth of the forearm.5) The eigenvalues more than 1.0 are up to the ninth principal component in both sexes. Their cumulative contributions are 68.2% in males and 66.0% in females.6) The first principal component accounts for the size factor.7) The second principal component explains the shape factor.
日本衛生学会の論文