Asayama K, Hayashi K, Kawada Y, Nakane T, Uchida N, Hayashibe H, Kawasaki K, Nakazawa S
Department of Pediatrics, Yamanashi Medical University, Japan.
Int J Obes Relat Metab Disord. 1997 Jul;21(7):594-9. doi: 10.1038/sj.ijo.0800447.
To explore a new anthropometric index of body fat distribution adjusted for ages ranging from 6-15 y in both boys and girls.
Sex, age, and 11 anthropometric variables were subjected to principal component analysis. Based on these results, we developed a new anthropometric index, namely an age-adjusted measure of body-fat distribution. This index was evaluated statistically for suitability of use in epidemiological surveys.
Japanese children, including obese and nonobese subjects, in one elementary and one junior high school in Yamanashi Prefecture, Japan: 508 boys and 549 girls whos ages ranged from 6 y 1 mon-15 y.
Measurements included the height (Ht), body weight, circumference of the waist, hip and thigh. Body mass index, the ratios of the waist, hip or thigh to the Ht, waist-hip ratio (WHR) and waist-thigh ration were calculated.
The first principal component (PC 1) accounted for 49.8% of the total variation, and was interpreted as an indicator of the general size on an individual. PC 2 accounted for 25.9%, and was interpreted as a shape measure that indicates body fat distribution. Calculation of WHR/Ht, a parameter that represented PC 2 adjusted by PC 1, gave an highly robust linear regression equation for age by gender. The residuals from the regression line for WHR/Ht deviated from normal distribution only in the boys, whereas the mean residual was nearly zero and distribution of the residuals was similar in three age subgroups by gender, supporting the use of the common standard deviation score in all age groups as an indicator of body fat distribution.
The common standard deviation score of WHR/Ht can serve as an epidemiological index of body fat distribution adjusted for ages between 6 and 15 y.
探索一种新的身体脂肪分布人体测量指数，该指数适用于6至15岁的男孩和女孩。
对性别、年龄和11项人体测量变量进行主成分分析。基于这些结果，我们开发了一种新的人体测量指数，即身体脂肪分布的年龄调整测量值。对该指数进行统计学评估，以确定其在流行病学调查中的适用性。
日本山梨县一所小学和一所初中的日本儿童，包括肥胖和非肥胖儿童：508名男孩和549名女孩，年龄在6岁1个月至15岁之间。
测量包括身高（Ht）、体重、腰围、臀围和大腿围。计算体重指数、腰围、臀围或大腿围与身高的比值、腰臀比（WHR）和腰大腿比。
第一主成分（PC 1）占总变异的49.8%，被解释为个体总体大小的指标。PC 2占25.9%，被解释为表示身体脂肪分布的形状测量指标。计算WHR/Ht（一个由PC 1调整的代表PC 2的参数），得出了按性别和年龄的高度稳健的线性回归方程。WHR/Ht回归线的残差仅在男孩中偏离正态分布，而平均残差几乎为零，且按性别划分的三个年龄亚组中残差分布相似，这支持在所有年龄组中使用共同的标准差分数作为身体脂肪分布的指标。
WHR/Ht的共同标准差分数可作为6至15岁年龄调整后的身体脂肪分布的流行病学指标。
