Abu Khaled M, McCutcheon M J, Reddy S, Pearman P L, Hunter G R, Weinsier R L
Department of Nutrition Sciences, University of Alabama, Birmingham 35294.
Am J Clin Nutr. 1988 May;47(5):789-92. doi: 10.1093/ajcn/47.5.789.
Fundamental aspects of the body impedance analysis (BIA) method were investigated to determine limitations. This method measures body impedance with a low-level (800 microA) 50-KHz current conducted through the tissues. A linear regression equation was proposed to relate impedance measurements to total body fat. The hydrostatic densitometric method (underwater weighing) was used to validate the proposed mathematical expression. A correlation coefficient of 0.98 between these two methods was obtained. The overall results from this study indicate the usefulness of the BIA method in determining percent body fat in humans provided body fluids are not perturbed several hours before the measurements.
为确定局限性，对人体阻抗分析（BIA）方法的基本方面进行了研究。该方法通过向组织传导低水平（800微安）50千赫的电流来测量人体阻抗。提出了一个线性回归方程，将阻抗测量值与全身脂肪联系起来。采用静水密度测量法（水下称重）来验证所提出的数学表达式。这两种方法之间的相关系数为0.98。这项研究的总体结果表明，如果在测量前几个小时内体液未受干扰，BIA方法在测定人体脂肪百分比方面是有用的。
