학술논문
Validity of two commercial grade bioelectrical impedance analyzers for measurement of body fat percentage
Document Type
Report
Author
Source
Journal of Exercise Physiology Online. August 1, 2013, Vol. 16 Issue 4, p74, 10 p.
Subject
Language
English
ISSN
1097-9751
Abstract
INTRODUCTION Body composition analysis is vital for understanding the proportions of fat and fat-free mass for healthy and unhealthy individuals. While computed tomography, magnetic resonance imaging, densitometry, and dual x-ray [...]
The purpose of this study was to validate the assessment of %Fat measured by two commercial grade BIA devices against the gold standard of dual x-ray absorptiometry (DEXA). Twenty-one subjects were measured for %Fat using three devices: an octopolar, multi-frequency BIA device (BIA8, BioSpace InBody R20); a quadripolar, single frequency BIA device (BIA4, Tanita BC-590BT); and a whole body DEXA (Hologic 4500). Mean ± SD differences in %Fat between the devices and DEXA were 0.14 ± 0.04 (P=0.80) (BIA8) and 1.77 ± 0.54 (P=0.76) (BIA4). Correlations with DEXA were r=0.98 (BIA8) and r=0.92 (BIA4). Bland-Altman analyses revealed a systematic bias for both BIA instruments vs. DEXA in which %Fat was underestimated in leaner subjects and overestimated in fatter subjects. All subjects had individual differences of Key Words: BIA, Body Composition, DEXA, Fat
The purpose of this study was to validate the assessment of %Fat measured by two commercial grade BIA devices against the gold standard of dual x-ray absorptiometry (DEXA). Twenty-one subjects were measured for %Fat using three devices: an octopolar, multi-frequency BIA device (BIA8, BioSpace InBody R20); a quadripolar, single frequency BIA device (BIA4, Tanita BC-590BT); and a whole body DEXA (Hologic 4500). Mean ± SD differences in %Fat between the devices and DEXA were 0.14 ± 0.04 (P=0.80) (BIA8) and 1.77 ± 0.54 (P=0.76) (BIA4). Correlations with DEXA were r=0.98 (BIA8) and r=0.92 (BIA4). Bland-Altman analyses revealed a systematic bias for both BIA instruments vs. DEXA in which %Fat was underestimated in leaner subjects and overestimated in fatter subjects. All subjects had individual differences of Key Words: BIA, Body Composition, DEXA, Fat