Development of a prediction equation for body composition in Japanese children

本研究的第一个目的是确定日本儿童身体成分的预测方程，第二个目的是检验身体成分变量的变化。结果可总结如下：1。从2001年到2003年，开发了日本儿童体内总水量的预测方程。70名年龄在3 - 6岁之间的日本儿童（39名男孩和31名女孩）参加了这项研究。在正向逐步回归分析中，氧化氘稀释测定的总水量96%的变异性可由以下公式预测：总水量(kg)=0.149×resistance指数（stature2/resistance, cm2/Ω）+0.244×weight(kg)+0.460×age(year)+0.501×sex（男孩=1，女孩=0）+1.628.2。测量身高、体重、阻抗值共6次，分别在2002 - 2004年的每年5月和11月进行。参与所有测量的受试者共188人，其中男生94人，女生94人。考虑了由上述预测方程得到的瘦体质量、体脂质量和体脂质量率的变化。根据年龄和性别计算身体成分变量的标准值。

The first purpose of this research was to determine the prediction equation of body composition in Japanese child, and the second purpose was examination of change of the variable of body composition. Results can be summarized as follows.1. A prediction equation for total body water in Japanese children was developed from 2001 to 2003. Seventy Japanese children (39 boys and 31 girls) with ages ranging between 3 and 6 years participated in this study. In a forward stepwise regression analysis, 96% of the variability in total body water measured by deuterium oxide dilution could be predicted by the following equation,Total body water(kg)=0.149×resistance index (stature2/resistance, cm2/Ω)+0.244×weight(kg)+0.460×age(year)+0.501×sex(boy=1, girl=0)+1.628.2. Measurement of height, weight, and an impedance value was performed a total of 6 times in May of an every year, and November from 2002 to 2004. The number of subjects which participated in all measurement was a total of 188 persons of 94 boys and 94 girls.3. Change of the amount of lean body mass and body fat mass, and rate of body fat mass obtained from the above-mentioned prediction equation was considered. The standard value of the variable about the body composition according to age and sex was calculated.