多频生物电阻抗法估计内脏脂肪面积。
Estimating visceral fat area by multifrequency bioelectrical impedance.
机构信息
Division of Epidemiology, Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan.
出版信息
Diabetes Care. 2010 May;33(5):1077-9. doi: 10.2337/dc09-1099. Epub 2010 Feb 11.
OBJECTIVE
We developed a new method of estimating visceral fat area (VFA) using multifrequency bioelectrical impedance (BI).
RESEARCH DESIGN AND METHODS
We considered abdominal composition as a parallel circuit model composed of VFA and subcutaneous fat area and calculated the impedance of VFA (IP(VFA)) from this model. The methods were tested against measures of VFA by computed tomography (CT). Multiple regression analysis was performed on 103 participants to estimate VFA. We cross-validated the regression equation against CT-measured VFA in 30 additional participants.
RESULTS
The regression equation was VFA = 3.57 x sagittal abdominal diameter + 311.97 x waist-to-height ratio + 0.71 x age + 23.93 x sex + 1.57 x IP(VFA) (250 kHz) - 174.35 (r = 0.904, P < 0.01). We observed a strong correlation by cross-validation (r = 0.905).
CONCLUSIONS
Our method using BI is a simple and convenient method for accurately estimating VFA.
目的
我们开发了一种使用多频生物电阻抗（BI）估计内脏脂肪面积（VFA）的新方法。
研究设计与方法
我们将腹部组成视为由 VFA 和皮下脂肪面积组成的并联电路模型，并从该模型中计算出 VFA 的阻抗（IP(VFA)）。该方法与 CT 测量的 VFA 进行了比较。对 103 名参与者进行了多元回归分析，以估算 VFA。我们在另外 30 名参与者中对 CT 测量的 VFA 进行了交叉验证。
结果
回归方程为 VFA = 3.57 x 矢状腹部直径 + 311.97 x 腰高比 + 0.71 x 年龄 + 23.93 x 性别 + 1.57 x IP(VFA)（250 kHz）-174.35（r = 0.904，P < 0.01）。我们通过交叉验证观察到了很强的相关性（r = 0.905）。
结论
我们使用 BI 的方法是一种简单方便的方法，可以准确估计 VFA。
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