Validity of fan-beam dual-energy X-ray absorptiometry for measuring fat-free mass and leg muscle mass
Validity of fan-beam dual-energy X-ray absorptiometry for measuring fat-free mass and leg muscle mass
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DOI：
10.1152/jappl.1999.87.4.1513
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发表时间：
1999-10-01
影响因子：
3.3
通讯作者：
Harris, TB
中科院分区：
文献类型：
--
作者：
Visser, M;Fuerst, T;Harris, TB
本研究的目的是检查扇形束双能X线吸收法（DEXA）测量全身去脂肪质量（FFM）和腿部肌肉质量（MM）的准确性在老年人。参与者为60名年龄在70-79岁之间的男性和女性，体重指数为17.5-39.8 kg/m（2）。使用DEXA（Hologic 4500 A，v8.21）测量腿部四个区域的FFM和MM。四室身体成分模型（4C）和多层计算机断层扫描（CT）的腿被用作FFM和MM的标准方法，分别。DEXA的FFM与4C的FFM呈正相关（R（2）= 0.98，估计值的SE = 1.6 kg）。实况调查团。关于DEXA 4C组的FFM（51.6 +/- 11.9 kg; P < 0.001）高于FFM（53.5 +/- 12.0（SD）kg）。两种方法的差异和平均值之间未观察到相关性。在所有四个腿部区域，DEXA的MM与CT呈正相关（R（2）= 0.86-0.96）。三个区域的MM DEXA均高于CT。这项研究的结果表明，扇束DEXA提供了相当大的承诺，测量全身FFM和腿部MM的老年人。
The aim of the study was to examine the accuracy of fan-beam dual-energy X-ray absorptiometry (DEXA) for measuring total body fat-free mass (FFM) and leg muscle mass (MM) in elderly persons. Participants were 60 men and women aged 70-79 yr and with a body mass index of 17.5-39.8 kg/m(2). FFM and MM at four leg regions were measured by using DEXA (Hologic 4500A, v8.21). A four-compartment body composition model (4C) and multislice computed tomography (CT) of the legs were used as the criterion methods for FFM and MM, respectively. FFM by DEXA was positively associated with FFM by 4C (R(2) = 0.98, SE of estimate = 1.6 kg). FFM. by DEXA. was higher [53.5 +/- 12.0 (SD) kg] than FFM by 4C (51.6 +/- 11.9 kg; P < 0.001). No association was observed between the difference and the mean of the two methods. MM. by DEXA was positively associated with CT at all four leg regions (R(2) = 0.86-0.96). MM by DEXA was higher than by CT in three regions. The results of this study suggest that fan-beam DEXA offers considerable promise for the measurement of total body FFM and leg MM in elderly persons.