Reproducibility and within-day variability of body fat measurements using segmental bipolar bioelectrical impedance in women

Details

Serval ID
serval:BIB_2C684AAD520C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Reproducibility and within-day variability of body fat measurements using segmental bipolar bioelectrical impedance in women
Journal
Alimentação humana
Author(s)
Marques-Vidal  Pedro Manuel, Paccaud Fred
ISSN
0873-4364
Publication state
Published
Issued date
2008
Volume
20
Number
1
Pages
3-7
Language
english
Abstract
BACKGROUND AND AIMS: little is known regarding the reproducibility of body fat measuring devices; hence, we assessed the between and within-device reproducibility, and the within-day variability of body fat measurements. METHODS: body fat percentage was measured twice on seventeen female students aged between 18 and 20 with a body mass index of 21.9 ± 2.5 kg/m2 (mean ± SD) using seven bipolar bioelectrical impedance devices. Each participant was also measured each hour between 7:00 and 22:00. RESULTS: the correlation between first and second measurements was very high (Spearman r between 0.985 and 1.000, p<0.001), as well as between devices (Spearman r between 0.916 and 0.991, p<0.001). Repeated measurements analysis showed no differences were between devices (p=0.59) or readings (first vs. second: p=0.74). Conversely, significant differences were found between assessment periods throughout the day, measurements made in the morning being lower than those made in the afternoon (F test for repeated values= 6.58, p<0.001). CONCLUSIONS: the between and within-device reproducibility for measuring body fat is high, enabling the use of multiple devices in a single study. Conversely, small but significant changes in body fat measurements occur during the day, urging body fat measurements to be performed at fixed times.
Keywords
Adipose Tissue, Adipose Tissue/metabolism, Body Composition, Electric Impedance, Anthropometry, Anthropometry/methods, Reproducibility of Results, Female, Women
Create date
22/06/2009 15:45
Last modification date
20/08/2019 13:11
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