Bioelectrical impedance spectroscopy and body composition.
Bioelectrical impedance spectroscopy and body composition.
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生物电阻抗光谱和身体成分。
DOI：
10.1111/j.1749-6632.2000.tb06452.x
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发表时间：
2000
影响因子：
5.2
通讯作者：
Guo,SS
中科院分区：
文献类型：
--
作者：
Chumlea,WC;Siervogel,RM;Wu,Y;Hall,G;Guo,SS
各参数与FFM、TBF和TBW的关系存在性别和种族差异。对于白色男性和女性以及黑人女性，由阻抗谱a解释的FFM和TBW的方差比例近似等于体重的方差比例（并且大于身高的方差比例）（表1）。该参数表示最高频率下阻抗值的渐近线。3图1绘制了白色男性和女性的a值与FFM的关系。它表明了一种线性关系，因为FFM比男性少的女性在高频下往往比男性具有更高的a值或更高的阻抗。其他光谱参数，B和c，仅解释了所有种族和性别组的FFM和TBW的一小部分方差。这些频谱参数在解释所有种族和性别组的TBF方差方面并没有提供信息;对于所有组，体重解释了方差的最大比例。
RESULTSThere were sex and race differences in the relationships of the parameters with FFM, TBF, and TBW. The proportion of the variance in FFM and TBW explained by impedance spectrum a was approximately equivalent to that of weight (and greater than that of stature) for White men and women and for Black women (Table 1). This parameter represents the asymptote of the value of impedance at the highest frequency. 3 Figure 1 plots the values of a against FFM for White men and women. It demonstrates a linear relationship, in that women with less FFM than men tend to have higher values of a or higher impedance at high frequency than the men. The other spectrum parameters, b and c, explained only small portions of the variance in FFM and TBW for all race and sex groups. These spectrum parameters were not that informative in explaining the variance in TBF for all race and sex groups; for all groups, weight explained the largest proportion of the variance.