New body fat prediction equations for severely obese patients

New body fat prediction equations for severely obese patients

Author Horie, Lilian Mika Google Scholar
Gonzalez Barbosa-Silva, Maria Cristina Google Scholar
Torrinhas, Raquel Susana Google Scholar
Mello, Marco Tulio de Autor UNIFESP Google Scholar
Cecconello, Ivan Google Scholar
Waitzberg, Dan Linetzky Google Scholar
Institution Universidade de São Paulo (USP)
Catholic Univ
Universidade Federal de São Paulo (UNIFESP)
Abstract Background & aims: Severe obesity imposes physical limitations to body composition assessment. Our aim was to compare body fat (BF) estimations of severely obese patients obtained by bioelectrical impedance (BIA) and air displacement plethysmography (ADP) for development of new equations for BF prediction.Methods: Severely obese subjects (83 female/36 mate, mean age = 41.6 +/- 11.6 years) had BF estimated by BIA and ADP. the agreement of the data was evaluated using Bland-Altman's graphic and concordance correlation coefficient (CCC). A multivariate regression analysis was performed to develop and validate new predictive equations.Results: BF estimations from BIA (64.8 +/- 15 kg) and ADP (65.6 +/- 16.4 kg) did not differ (p > 0.05, with good accuracy, precision, and CCC), but the Bland- Altman graphic showed a wide Limit of agreement (- 10.4; 8.8). the standard BIA equation overestimated BF in women (-1.3 kg) and underestimated BF in men (5.6 kg; p < 0.05). Two BF new predictive equations were generated after BIA measurement, which predicted BF with higher accuracy, precision, CCC, and limits of agreement than the standard BIA equation.Conclusions: Standard BIA equations were inadequate for estimating BF in severely obese patients. Equations developed especially for this population provide more accurate BF assessment. (C) 2008 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.
Keywords severe obesity
bioelectrical impedance
body composition
prediction equation
Language English
Date 2008-06-01
Published in Clinical Nutrition. Edinburgh: Churchill Livingstone, v. 27, n. 3, p. 350-356, 2008.
ISSN 0261-5614 (Sherpa/Romeo, impact factor)
Publisher Churchill Livingstone
Extent 350-356
Access rights Closed access
Type Article
Web of Science ID WOS:000257980300005

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