瑞典老年人生物电阻抗法估算身体成分。基于人群的70岁和75岁人群无脂肪量和体脂预测方程及参考值的建立。

Body composition estimated by bioelectrical impedance in the Swedish elderly. Development of population-based prediction equation and reference values of fat-free mass and body fat for 70- and 75-y olds.

作者信息

Dey D K, Bosaeus I, Lissner L, Steen B

机构信息

Department of Geriatric Medicine, Göteborg University, Sweden.

出版信息

Eur J Clin Nutr. 2003 Aug;57(8):909-16. doi: 10.1038/sj.ejcn.1601625.

DOI:10.1038/sj.ejcn.1601625

PMID:12879085

Abstract

OBJECTIVE

To develop a bioelectrical impedance (BIA) prediction equation for fat-free mass (FFM(BIA)) and present reference values of FFM and body fat (BF) for healthy Swedish elderly from population-based representative samples.

SUBJECTS

This study is based on 823 (344 males, 479 females) participants from two systematic samples of birth cohorts in Göteborg aged 70 (cohort H70V, 201 males and 299 females) and 75 (cohort NORA75, 143 males and 180 females).

METHODS

Body composition was measured with BIA (BIA-101, RJL system, Detroit) in both cohorts and was estimated by a four-compartment (4C) model from total body water (TBW) and total body potassium (TBK) in a sub-sample of the NORA75 cohort. The FFM(BIA) was validated against the FFM from the 4C model (FFM(4C)).

RESULTS

The FFM(BIA) correlated well with FFM(4C) (r=0.95, SEE=2.64 kg). The FFM(BIA) (kg) in 70-y-old males and females were 58.5+/-5.4 and 43.4+/-4.4, and for 75-y-old males and females were 56.1+/-4.7 and 42.5+/-4, respectively. The body fat in kg (FM) among 70-y-old males and females were 25.2+/-8.1 and 25.7+/-8.4, and for 75-y-old males and females were 21.7+/-7.1 and 22.8+7.2, respectively. The percent body fat (BF%) among 70-y-old males and females were 29.5+/-5.8 and 36.3+/-6.4, and for 75-y-old males and females were 27.3+/-6 and 34.1+/-6.1, respectively.

CONCLUSION

The FFM, FM and BF% from this study might be used as reference values for Swedish elderly aged 70 and 75 y.

摘要

目的

建立无脂肪量（FFM(BIA)）的生物电阻抗（BIA）预测方程，并给出基于人群代表性样本的瑞典健康老年人FFM和体脂（BF）的参考值。

对象

本研究基于哥德堡两个出生队列系统样本中的823名参与者（344名男性，479名女性），年龄分别为70岁（H70V队列，201名男性和299名女性）和75岁（NORA75队列，143名男性和180名女性）。

方法

在两个队列中均使用BIA（BIA - 101，RJL系统，底特律）测量身体成分，并在NORA75队列的一个子样本中通过四室（4C）模型根据总体水（TBW）和总体钾（TBK）估算身体成分。将FFM(BIA)与4C模型得出的FFM（FFM(4C)）进行验证。

结果

FFM(BIA)与FFM(4C)相关性良好（r = 0.95，标准误 = 2.64 kg）。70岁男性和女性的FFM(BIA)（kg）分别为58.5±5.4和43.4±4.4，75岁男性和女性分别为56.1±4.7和42.5±4。70岁男性和女性的体脂（kg，FM）分别为25.2±8.1和25.7±8.4，75岁男性和女性分别为21.7±7.1和22.8±7.2。70岁男性和女性的体脂百分比（BF%）分别为29.5±5.8和36.3±6.4，75岁男性和女性分别为27.3±6和34.1±6.1。