Body composition analysis by leg-to-leg bioelectrical impedance and dual-energy X-ray absorptiometry in non-obese and obese individuals
Body composition analysis by leg-to-leg bioelectrical impedance and dual-energy X-ray absorptiometry in non-obese and obese individuals
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DOI：
10.1111/j.1463-1326.2008.00851.x
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发表时间：
2008-11-01
影响因子：
5.8
通讯作者：
Boyanov, M. A.
中科院分区：
文献类型：
--
作者：
Boneva-Asiova, Z.;Boyanov, M. A.
目的：比较生物电阻抗分析（BIA）和双能x线吸收仪（DXA）测量的总体重、体脂% （% BF）、脂肪质量（FM）和无脂质量（FFM）。方法：本横断面研究纳入159名女性（平均年龄：49.1 +/- 10.0岁）和124名男性（平均年龄：51.4 +/- 8.0岁），按性别和体重指数（BMI）细分：BMI < 30 kg/m(2)（66名女性和50名男性）；体重指数30-35公斤/米(2)（53名女性和44名男性）和体重指数bbb = 35公斤/米(2)（40名女性和30名男性）。在禁食状态下，在Tanita TBF-215腿对腿分析仪（Tanita，东京，日本）上进行生物电阻抗测试。在Hologic QDR 4500 a骨密度仪（Hologic, Bedford， MA， USA）上进行全身DXA扫描。测定总重、BF %、FM和FFM的方法间差异。进行线性回归和相关分析。建立了协议界限和Bland-Altman地块。结果：dxa导出的体成分参数与BIA估计值无显著差异，且高度相关（如FFM， r = 0.82-0.95）。在瘦个体中，与DXA相比，BIA产生的FM和% BF值更低，FFM值更高。这一趋势在BMI为35 kg/m(2)时发生逆转。这种相关性随着BMI的增加而降低。这种一致性的极限在男性中要比在女性中好得多，并且随着男女体重指数的增加而增加。结论：与DXA相比，腿对腿的Tanita TBF-215分析仪准确地评估了异质组男女的身体成分。对于非常肥胖的女性（BMI为35 kg/m(2)），应谨慎看待BIA测量。
Aim: The aim of this study is to compare total weight, % body fat (% BF), fat mass ( FM) and fat-free mass (FFM) measured by bioelectrical impedance analysis (BIA) and dual-energy X-ray absorptiometry (DXA).Methods: This cross-sectional study included 159 women (mean age: 49.1 +/- 10.0 years) and 124 men (mean age: 51.4 +/- 8.0 years) subdivided according to sex and body mass index (BMI): BMI < 30 kg/m(2) (66 women and 50 men); BMI 30-35 kg/m(2) (53 women and 44 men) and BMI >= 35 kg/m(2) (40 women and 30 men). Bioelectrical impedance was performed in the fasting state on a Tanita TBF-215 leg-to-leg analyser ( Tanita, Tokyo, Japan). Whole-body DXA scans were performed on a Hologic QDR 4500 A bone densitometer ( Hologic, Bedford, MA, USA). Total weight, % BF, FM and FFM were tested for intermethod differences. Linear regression and correlation analysis was performed. Limits of agreement and Bland-Altman plots were built.Results: DXA-derived body composition parameters were not significantly different from BIA estimates and were highly correlated (e.g. for FFM, r = 0.82-0.95). In lean individuals, BIA tended to produce lower values for FM and % BF and higher ones for FFM in comparison with DXA. This trend was reversed at BMI > 35 kg/m(2). The correlations decreased with increasing BMI. The limits of agreement were much better in men than in women and increased with increasing BMI in both sexes.Conclusions: Compared with DXA, the leg-to-leg Tanita TBF-215 analyser accurately assessed body composition in a heterogeneous group of both sexes. In the very obese women (BMI > 35 kg/m(2)), BIA measurements should be viewed with caution.