Prediction of lean body mass from multifrequency segmental impedance: influence of adiposity
Prediction of lean body mass from multifrequency segmental impedance: influence of adiposity
复制标题
从多频节段阻抗预测去脂体重：肥胖的影响
DOI：
10.1007/s005920170020
复制
发表时间：
2001
影响因子：
3.8
通讯作者：
A. De Lorenzo
中科院分区：
文献类型：
--
作者：
A. Tagliabue;A. Andreoli;M. Comelli;S. Bertoli;G. Testolin;G. Oriani;A. De Lorenzo
摘要本研究旨在探讨肥胖对人体各节段生物电阻抗(BIA)测量与双能X线骨密度仪(DXA)估测身体成分之间关系的影响。对68例(女性46例，男性22例)正常体重者和肥胖者的全身多频和节段性阻抗进行了测量，年龄18~69岁，平均37.2±14.8岁。在肥胖和正常体重受试者中，DXA评估的总和附件瘦体重(LBM)与根据身高调整后的总和节段阻抗值显著相关。回归模型中考虑和不考虑肥胖(DXA测量的体脂百分比)的情况下，推导出了从节段性阻抗测量预测附件LBM的最佳拟合方程。在低频下对手臂的预测效果最好，腿部在高频下的预测效果最好。肥胖似乎显著影响BIA对小腿LBM的预测。这些初步观察需要进一步的验证，以提供BIA对附件LBM评估的准确评估。
Abstract The aim of the study was to determine the influence of adiposity on the relationship between bioelectrical impedance (BIA) measurements of body segments and estimation of body composition by dual-energy X-ray absorptiometry (DXA). Multiple frequencies of whole body and segmental impedances were measured in 68 normal-weight and obese subjects (46 women and 22 men), mean age 37.2±14.8 years (range, 18–69). Total and appendicular lean body mass (LBM) assessed by DXA correlated significantly with total and segmental impedance values adjusted for stature in both obese and normal-weight subjects. Best fitting equations for the prediction of appendicular LBM from segmental impedance measurements were derived for the arm and leg with and without the inclusion of adiposity (the percentage of body fat measured by DXA) in the regression models. Best prediction was obtained at low frequency for the arm and high frequency for the leg. Adiposity appears to significantly influence the prediction of leg LBM by BIA. These preliminary observations need further validation to provide an accurate assessment of appendicular LBM assessment by BIA.