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

Détails

ID Serval
serval:BIB_45CF0AC9836D
Type
Actes de conférence (partie): contribution originale à la littérature scientifique, publiée à l'occasion de conférences scientifiques, dans un ouvrage de compte-rendu (proceedings), ou dans l'édition spéciale d'un journal reconnu (conference proceedings).
Sous-type
Abstract (résumé de présentation): article court qui reprend les éléments essentiels présentés à l'occasion d'une conférence scientifique dans un poster ou lors d'une intervention orale.
Collection
Publications
Titre
Reproducibility and within-day variability of body fat masurements using segmental bipolar bioelectrical impedance in women
Titre de la conférence
16th European Congress on Obesity (ECO), Geneva, Switzerland, 14-17 May 2008
Auteur(s)
Marques-Vidal Pedro Manuel, Paccaud Fred
ISBN
0307-0565
Statut éditorial
Publié
Date de publication
2008
Volume
32
Série
International Journal of Obesity
Pages
S220
Langue
anglais
Résumé
Objective: to assess the between and within-device reproducibility, as well as within-day variability of body fat measurements.
Methods: body fat percentage (%BF) was measured twice on seventeen female students aged between 18 and 20 with a body mass index of 21.9 22.6 kg/m2 (mean SD) using seven bipolar bioelectrical impedance devices (BF-306) according to the manufacturer's recommendations. Each student was also measured each hour between 7:00 and 22:00. Statistical analysis was conducted using a general linear model for repeated measurements.
Results: the correlation between first and second measurements was very high (Pearson r between 0.985 and 1.000, p<0.001), as well as the correlation between devices (Pearson r between 0.986 and 0.999, all p<0.001). Repeated measurements analysis showed no differences were between devices (F test=0.83, p=0.59) or readings (first vs. second: F test=0.12, 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. Assuming an overall daily average of 100 (based on all measurements), the values were 95.8 3.2 (mean SD) at 8:00 versus 101.3 3.0 at 20:00, corresponding to a mean change of 2.2 1.1 in %BF (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.
Open Access
Oui
Création de la notice
04/03/2009 17:27
Dernière modification de la notice
08/05/2019 17:54
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