Longitudinal Study of Growth of American-Japanese Children

对1946-1965年间出生的美籍日本儿童的身高、体重、胸围和腿长的纵向数据进行了分析。建立了两个数据集：一个是针对149名儿童的混合纵向研究，另一个是针对88名儿童的纵向研究。黑人和白人日本人的比较：在女孩中，B-Jpn的身高较高，而男孩的W-Jpn在18岁以后变得更高；W-Jpn的体重在男女年龄较低的年龄组中都较轻，此后又相反。在9岁以前，W-Jpn女孩的胸围较小，但在B-Jpn男孩中，胸围在所有年龄段都较大。无论男女，B-Jpn的腿长都较大，但在17岁或18岁以后，B-Jpn与W-Jpn的差异缩小或相反。除胸围外，所有年龄的女孩都比W-Jpn早2~3岁。在W-Jpn女孩中，青春期的喷发非常强烈。B-Jpn组和W-Jpn组女孩的身高、体重、胸围和月经初潮年龄的峰值年龄顺序为：Am-Jpn组儿童和亲代组儿童比较：Am-Jpn组儿童的身高生长曲线与低年龄组Jpn组儿童的生长曲线接近，B-Jpn组和W-Am组儿童的体态生长曲线接近，B-Jpn组和W-Jpn组儿童的体格生长曲线接近B-Am组和W-Am组。B-Jpn体重曲线与B-Am一致，而W-Jpn体重曲线与日本人一致。在胸围方面，Am-Jpn曲线在较低年龄组的男女儿童中都接近日本人，而前者的胸围增长加速并超过后者。Am-Jpn儿童的腿长与身高的相对长度总是小于B-Am和W-Am儿童。W-Jpn与英国和瑞士儿童的比较也被进行了。

Longitudinal data on stature, weight, chest circumference, and leg length of American-Japanese children, born between 1946-1965, were analyzed. Two data sets were established : one on 149 children for a mixed-logitudinal study, and the other is on 88 children for a longitudinal study. With the latter, some parameters were set on the growth velocity curve and adolescent spurt of each child and each measurement.Comparison between Black- and White-Japanese : In girls, stature was higher in B-Jpn, but in boys W-Jpn become higher after age 18. Weight was lighter in W-Jpn in lower age groups of both sexes ; thereafter it became the inverse. Chest circumf.was smaller in W-Jpn girls until age 9, but in boys B-Jpn it was greater in all age groups. Leg length was greater in B-Jpn in both sexes, but the difference from W-Jpn diminishes or became the inverse after ages 17 or 18. All ages at the parameters, except chest circumf., appeared 2 to 3 years earlier in girls. Adolescent spurts were very strong in W-Jpn girs. The sequence of peak ages was in order of leg length, stature, weight, chest circumf., and finally menarcheal age in girls in both B- and W-Jpn children.Comparison between Am-Jpn children and parental group children : Am-Jpn statural growth curve was close to that of Jpn children in lower age groups in both sexes ; then, the B-Jpn became close to the B-Am, and the W-Jpn to the W-Am. The B-Jpn weight curve coincided with the B-Am, whereas the W-Jpn coincide with the Japanese. For chest circumf., the Am-Jpn curve approached to the Japanese in both sexes in lower age groups, whereas the former's chest growth accelerated and overtook the latter's. Relative leg length to stature was always less in Am-Jpn children than either B- and W-Am children.A comparison of W-Jpn to British and Swiss children was also executed.