Presta E, Casullo A M, Costa R, Slonim A, Van Itallie T B
Department of Medicine, College of Physicians and Surgeons, Columbia University at St. Luke's-Roosevelt Hospital Center, New York 10025.
J Appl Physiol (1985). 1987 Sep;63(3):937-41. doi: 10.1152/jappl.1987.63.3.937.
This comparative study, conducted on 28 boys and girls of widely varying fatness, was designed to validate a new whole-body composition method [total body electrical conductivity (TOBEC)], based on bioelectrical properties of the human body. A significant correlation [r = 0.911; standard error of the estimate (SEE) = 5.3 kg] was demonstrated between the transformed TOBEC scores (TOBEC0.5 X Ht) and lean body mass (LBM) determined by hydrodensitometry and corrected for individual variations in hydration (LBMd + W). TOBEC determinations also correlated well with 1) total body water determined by deuterium oxide dilution (r = 0.877; SEE = 4.5 liters), 2) total body potassium determined by means of a 4 pi whole-body counter (r = 0.860; SEE = 430.7 meq), 3) LBM derived from skinfold thicknesses (r = 0.850; SEE = 5.8 kg). The residuals of the regression between LBMd + W and TOBEC scores did not show any significant correlation with either the potassium or the water content of the LBM. The results indicate that TOBEC is a simple, rapid, reliable, and noninvasive technique for delineating changes in body composition that occur in children during growth.
这项对比研究对28名胖瘦程度差异很大的男孩和女孩进行，旨在验证一种基于人体生物电特性的全新全身成分分析方法[全身电阻抗分析（TOBEC）]。通过全身电阻抗分析得出的分数（TOBEC0.5×身高）与通过水下密度测量法测定并针对个体水合作用差异进行校正后的瘦体重（LBMd + W）之间呈现出显著相关性[r = 0.911；估计标准误差（SEE）= 5.3千克]。全身电阻抗分析的测定结果还与以下各项具有良好的相关性：1）通过重水稀释法测定的全身水分（r = 0.877；SEE = 4.5升），2）通过4π全身计数器测定的全身钾含量（r = 0.860；SEE = 430.7毫当量），3）由皮褶厚度推导得出的瘦体重（r = 0.850；SEE = 5.8千克）。瘦体重（LBMd + W）与全身电阻抗分析分数之间回归的残差与瘦体重中的钾含量或水分含量均未显示出任何显著相关性。结果表明，全身电阻抗分析是一种简单、快速、可靠且无创的技术，可用于描绘儿童生长过程中身体成分的变化。
