Development of a new method for estimating visceral fat area with multi-frequency bioelectrical impedance
Development of a new method for estimating visceral fat area with multi-frequency bioelectrical impedance
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DOI：
10.1620/tjem.214.105
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发表时间：
2008-02-01
影响因子：
2.2
通讯作者：
Ikeda, Yoshio
中科院分区：
文献类型：
--
作者：
Nagai, Masato;Komiya, Hideaki;Ikeda, Yoshio
过多的内脏脂肪面积（VIA）是心血管疾病等疾病的主要危险因素。在评估VFA时，采用计算机断层扫描（CT）作为金标准；然而，这种方法成本高且涉及辐射暴露。相比之下，用于估计身体成分的生物电阻抗（131）方法简单且无创，因此其在VIA评估中的潜在应用正在研究中。为了克服测量条件导致的阻抗差异，我们通过选择最佳的身体姿势、电极排列和频率，开发了一种更精确的估计方法。研究对象是73名健康志愿者，37名男性和36名女性，他们接受了CT扫描来评估VFA，并测量了人体测量参数、皮下脂肪层厚度、腹部组织面积和阻抗。阻抗测量采用多频BI四极阻抗法。采用多元回归分析对VIA进行估计。结果显示，CT观察到的VIA与阻抗估计的VIA有很强的相关性（r = 0.920）。回归方程准确地将14名男性中的13名和1名女性中的1名的VFA >= 100 cm(2)分类。以腰围(W)作为评价VFA的简单指标，4名男性中有3名、1名女性中有1名被错误分类为VFA >= 100 cm(2)或< 100 cm(2)。因此，使用这种简单方便的方法来估算VIA，我们获得了BI方法对VIA的准确评估。
Excessive visceral fat area (VIA) is a major risk factor in such conditions as cardiovascular disease. In assessing VFA, computed tomography (CT) is adopted as the gold standard; however, this method is cost intensive and involves radiation exposure. In contrast, the bioelectrical impedance (131) method for estimating body composition is simple and noninvasive and thus its potential application in VIA assessment is being studied. To overcome the difference in obtained impedance due to measurement conditions, we developed a more precise estimation method by selecting the optimum body posture, electrode arrangement, and frequency. The subjects were 73 healthy volunteers, 37 men and 36 women, who underwent CT scans to assess VFA and who were measured for anthropometry parameters, subcutaneous fat layer thickness, abdominal tissue area, and impedance. Impedance was measured by the tetrapolar impedance method using multi-frequency BI. Multiple regression analysis was conducted to estimate VIA. The results revealed a strong correlation between VIA observed by CT and VIA estimated by impedance (r = 0.920). The regression equation accurately classified VFA >= 100 cm(2) in 13 out of 14 men and 1 of 1 woman. Moreover, it classified VFA >= 100 cm(2) or < 100 cm(2) in 3 out of 4 men and 1 of 1 woman misclassified by waist circumference (W) which was adopted as a simple index to evaluate VFA. Therefore, using this simple and convenient method for estimating VIA, we obtained an accurate assessment of VIA using the BI method.