Sport Science Research Center, National Taiwan University of Sport, Taichung, 40404, Taiwan.
Department of Physical Education, National Taiwan University of Sport, Taichung, 40404, Taiwan.
Sci Rep. 2017 Aug 22;7(1):9102. doi: 10.1038/s41598-017-08991-y.
The aim of this study was to evaluate leg-to-leg bioelectrical impedance analysis (LBIA) using a four-contact electrode system for measuring abdominal visceral fat area (VFA). The present study recruited 381 (240 male and 141 female) Chinese participants to compare VFA measurements estimated by a standing LBIA system (VFALBIA) with computerized tomography (CT) scanned at the L4-L5 vertebrae (VFA). The total mean body mass index (BMI) was 24.7 ± 4.2 kg/m. Correlation analysis, regression analysis, Bland-Altman plot, and paired sample t-tests were used to analyze the accuracy of the VFA. For the total subjects, the regression line was VFA = 0.698 VFA + 29.521, (correlation coefficient (r) = 0.789, standard estimate of error (SEE) = 24.470 cm, p < 0.001), Lin's correlation coefficient (CCC) was 0.785; and the limit of agreement (LOA; mean difference ±2 standard deviation) ranged from -43.950 to 67.951 cm, LOA% (given as a percentage of mean value measured by the CT) was 48.2%. VFA and VFA showed significant difference (p < 0.001). Collectively, the current study indicates that LBIA has limited potential to accurately estimate visceral fat in a clinical setting.
本研究旨在评估使用四电极系统的双腿生物电阻抗分析（LBIA）测量腹部内脏脂肪面积（VFA）的方法。本研究共招募了 381 名（240 名男性和 141 名女性）中国参与者，比较了站立式 LBIA 系统（VFALBIA）估计的 VFA 与 L4-L5 椎骨 CT 扫描的 VFA（VFA）。总体平均体重指数（BMI）为 24.7±4.2kg/m2。采用相关分析、回归分析、Bland-Altman 图和配对样本 t 检验来分析 VFA 的准确性。对于所有受试者，回归线为 VFA=0.698 VFA+29.521（相关系数（r）=0.789，标准误差估计值（SEE）=24.470cm，p<0.001），Lin 相关系数（CCC）为 0.785；一致性界限（LOA；平均差值±2 标准差）范围为-43.950 至 67.951cm，LOA%（以 CT 测量值的百分比表示）为 48.2%。VFA 和 VFA 之间存在显著差异（p<0.001）。总的来说，本研究表明 LBIA 在临床环境中准确估计内脏脂肪的潜力有限。
