成長過程の追跡研究-2-小中学生期の成長
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概要
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Heights of children were followed up from the first year of elementary school (6 years old) to third year of junior high school (14 years old) on 875 boys and 795 girls who were in the third year of nine junior high schools in Kyoto City as of April, 1968. The following results were obtained by analysis of the data.1) Relatively large positive correlations were found between heights at the age of six and heights every age up to 14 years. This finding suggests that the relative height of a child is already fixed relatively conclusively at the age of six.2) The increment of height between every two successive years was obtained for an individual child. The means and standard deviations calculated from these individual yearly increments of heights may serve to settle the normal range of the yearly increment of height between every two successive years. It was also found that there were relatively large individual variations in the yearly increment of height between every two successive years.3) Using Rao's method, the standard growth curves of height of children and their 99% confidence bands were obtained for groups of boys and girls classified by their height at the age of six, on the assumption that the deviation of any individual growth process from population growth curve has a multivariate normal distribution. It was found that the standard growth curve of height which was expressed by the compound cubic expression having two arguments concerning age of year corresponded well with the observations in every group, although coefficients and domain of definition of each argument were different in every group.
- 日本衛生学会の論文