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Appears in Collections:Faculty of Health Sciences and Sport Journal Articles
Peer Review Status: Refereed
Title: The validity of predicted body fat percentage from body mass index and from impedance in samples of five European populations
Author(s): Deurenberg, Paul R
Andreoli, Angela
Borg, Patrik T
Kukkonen-Harjula, Katriina T
De Lorenzo, Antonino D
Van Marken Lichtenbelt, Wouter D
Testolin, Giulio
Viganò, R
Vollaard, Niels
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Keywords: body composition
body fat percentage
body mass index
bioelectrical impedance
international comparison
Issue Date: 30-Nov-2001
Date Deposited: 6-Nov-2018
Citation: Deurenberg PR, Andreoli A, Borg PT, Kukkonen-Harjula KT, De Lorenzo AD, Van Marken Lichtenbelt WD, Testolin G, Viganò R & Vollaard N (2001) The validity of predicted body fat percentage from body mass index and from impedance in samples of five European populations. European Journal of Clinical Nutrition, 55 (11), pp. 973-979.
Abstract: Objectives: To test and compare the validity of a body mass index (BMI)-based prediction equation and an impedance-based prediction equation for body fat percentage among various European population groups. Design: Cross-sectional observational study. Settings: The study was performed in five different European centres: Maastricht and Wageningen (The Netherlands), Milan and Rome (Italy) and Tampere (Finland), where body composition studies are routinely performed. Subjects: A total of 234 females and 182 males, aged 18-70 y, BMI 17.0-41.9 kg/m2. Methods: The reference method for body fat percentage (BF%REF) was either dual-energy X-ray absorptiometry (DXA) or densitometry (underwater weighing). Body fat percentage (BF%) was also predicted from BMI, age and sex (BF%BMI) or with a hand-held impedance analyser that uses in addition to arm impedance weight, height, age and sex as predictors (BF%IMP). Results: The overall mean (±s.e.) bias (measured minus predicted) for BF%BMI was 0.2 ± 0.3 (NS) and -0.7 ± 0.3 (NS) in females and males, respectively. The bias of BF%IMP was 0.2 ± 0.2 (NS) and 1.0 ± 0.4 (P < 0.01) for females and males, respectively. There were significant differences in biases among the centres. The biases were correlated with level of BF% and with age. After correction for differences in age and BF% between the centres the bias of BF%BMI was not significantly different from zero in each centre and was not different among the centres anymore. The bias of BF%IMP decreased after correction and was significant from zero and significant from the other centres only in males from Tampere. Generally, individual biases can be high, leading to a considerably misclassification of obesity. The individual misclassification was generally higher with the BMI-based prediction. Conclusions: The prediction formulas give generally good estimates of BF% on a group level in the five population samples, except for the males from Tampere. More comparative studies should be conducted to get better insight in the generalisation of prediction methods and formulas. Individual results and classifications have to be interpreted with caution.
DOI Link: 10.1038/sj.ejcn.1601254
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