Prins M, Hawkesworth S, Wright A, Fulford A J C, Jarjou L M A, Prentice A M, Moore S E
Wageningen University and Research Centre, Wageningen, The Netherlands.
Eur J Clin Nutr. 2008 Sep;62(9):1065-74. doi: 10.1038/sj.ejcn.1602830. Epub 2007 Jul 11.
To validate the Tanita BC-418MA Segmental Body Composition Analyser and four-site skinfold measurements for the prediction of total body water (TBW), percentage fat-free mass (%FFM) and percentage body fat (%BF) in a population of rural Gambian children.
SUBJECTS/METHODS: One hundred and thirty-three healthy Gambian children (65 males and 68 females). FFM estimated by the inbuilt equations supplied with the Tanita system was assessed by comparison with deuterium oxide dilution and novel prediction equations were produced. Deuterium oxide dilution was also used to develop equations for %BF based on four-site skinfolds (biceps, triceps, subscapular and suprailiac).
The inbuilt equations underestimated FFM compared to deuterium oxide dilution in all the sex and age categories (P<0.003), with greater accuracy in younger children and in males. The best prediction of %FFM was obtained from the variables height, weight, sex, impedance, age and four skinfold thickness measurements (adjusted R(2)=0.84, root mean square error (MSE)=2.07%).
These data suggest that the Tanita instrument may be a reliable field assessment technique in African children, when using population and gender-specific equations to convert impedance measurements into estimates of FFM.
验证百利达BC - 418MA分段身体成分分析仪及四点皮褶测量法在预测冈比亚农村儿童总体水（TBW）、去脂体重百分比（%FFM）和体脂百分比（%BF）方面的效果。
对象/方法：133名健康的冈比亚儿童（65名男性和68名女性）。通过与氧化氘稀释法比较，评估百利达系统内置公式估算的去脂体重，并生成新的预测公式。氧化氘稀释法也被用于基于四点皮褶（肱二头肌、肱三头肌、肩胛下和髂嵴上）建立体脂百分比公式。
与氧化氘稀释法相比，所有性别和年龄组的内置公式均低估了去脂体重（P<0.003），在年幼儿童和男性中准确性更高。通过身高、体重、性别、阻抗、年龄和四项皮褶厚度测量变量可获得对去脂体重百分比的最佳预测（调整后R² = 0.84，均方根误差（MSE）= 2.07%）。
这些数据表明，当使用针对特定人群和性别的公式将阻抗测量值转换为去脂体重估计值时，百利达仪器可能是一种用于非洲儿童的可靠现场评估技术。
