Clasey J L, Bouchard C, Teates C D, Riblett J E, Thorner M O, Hartman M L, Weltman A
Department of Internal Medicine, University of Virginia, Charlottesville 22908, USA.
Obes Res. 1999 May;7(3):256-64. doi: 10.1002/j.1550-8528.1999.tb00404.x.
A single-slice computed tomography (CT) scan provides a criterion measure of total abdominal fat (TAF) and abdominal visceral fat (AVF), but this procedure is often prohibitive due to radiation exposure, cost, and accessibility. In the present study, the utility of anthropometric measures and estimates of trunk and abdominal fat mass by dual-energy X-ray absorptiometry (DXA) to predict CT measures of TAF and AVF (cross-sectional area, cm2) was assessed.
CT measures of abdominal fat (at the level of the L4-L5 inter-vertebral space), DXA scans, and anthropometric measures were obtained in 76 Caucasian adults ages 20-80 years.
Results demonstrated that abdominal sagittal diameter measured by anthropometry is an excellent predictor of sagittal diameter measured from a CT image (r=0.88 and 0.94; Total Error [TE]=4.1 and 3.1 cm, for men and women, respectively). In both men and women, waist circumference and abdominal sagittal diameter were the anthropometric measures most strongly associated with TAF (r=0.87 to 0.93; Standard Error of Estimate (SEE)=60.7 to 75.4 cm2) and AVF (r=0.84 to 0.93; SEE=0.7 to 30.0 cm2). The least predictive anthropometric measure of TAF or AVF was the commonly used waist-to-hip ratio (WHR). DXA estimates of trunk and abdominal fat mass were strongly associated with TAF (r=.94 to 0.97; SEE=36.9 to 50.9 cm2) and AVF (r=0.86 to 0.90; SEE=4.9 to 27.7 cm2).
The present results suggest that waist circumference and/or abdominal sagittal diameter are better predictors of TAF and AVF than the more commonly used WHR. DXA trunk fat and abdominal fat appear to be slightly better predictors of TAF but not AVF compared to these anthropometric measures. Thus DXA does not offer a significant advantage over anthropometry for estimation of AVF.
单层计算机断层扫描（CT）可提供腹部总脂肪（TAF）和腹部内脏脂肪（AVF）的标准测量值，但由于辐射暴露、成本和可及性等因素，该检查方法往往难以实施。在本研究中，评估了人体测量指标以及通过双能X线吸收法（DXA）估算的躯干和腹部脂肪量对预测TAF和AVF的CT测量值（横截面积，cm²）的效用。
对76名年龄在20至80岁的白种成年人进行了腹部脂肪的CT测量（在L4-L5椎间隙水平）、DXA扫描以及人体测量。
结果表明，通过人体测量得到的腹部矢状径是CT图像测量矢状径的优秀预测指标（男性r = 0.88，女性r = 0.94；总误差[TE]分别为4.1 cm和3.1 cm）。在男性和女性中，腰围和腹部矢状径是与TAF（r = 0.87至0.93；估计标准误差[SEE] = 60.7至75.4 cm²）和AVF（r = 0.84至0.93；SEE = 0.7至30.0 cm²）相关性最强的人体测量指标。对TAF或AVF预测性最差的人体测量指标是常用的腰臀比（WHR）。DXA估算的躯干和腹部脂肪量与TAF（r = 0.94至0.97；SEE = 36.9至50.9 cm²）和AVF（r = 0.86至0.90；SEE = 4.9至27.7 cm²）密切相关。
目前的结果表明，腰围和/或腹部矢状径比常用的WHR能更好地预测TAF和AVF。与这些人体测量指标相比，DXA测量的躯干脂肪和腹部脂肪似乎对TAF的预测略好，但对AVF并非如此。因此，在估算AVF方面，DXA相对于人体测量并无显著优势。
