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Cited by 119Body Composition Measurement TechniquesObesity, Physical Activity, DietElectrical and Bioimpedance Tomography

Bioelectrical impedance underestimates total and truncal fatness in abdominally obese women

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Neovius, Martin, Hemmingsson, Erik, Freyschuss, Bo, Uddén, Joanna·2006·Obesity
DOI 10.1038/oby.2006.199
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Abstract

OBJECTIVE: To compare estimates of total and truncal fatness from eight-electrode bioelectrical impedance analysis equipment (BIA(8)) with those from DXA in centrally obese women. The secondary aim was to examine BMI and waist circumference (WC) as proxy measures for percentage total body fat (%TBF) and truncal body fat percentage (tr%BF). RESEARCH METHODS AND PROCEDURES: This was a cross-sectional study of 136 women (age, 48.1 +/- 7.7 years; BMI, 30.4 +/- 2.9 kg/m(2); %TBF(DXA), 46.0 +/- 3.7%; WC, 104 +/- 8 cm). Fatness was measured by DXA and Tanita BC-418 equipment (Tanita Corp., Tokyo, Japan). Agreement among methods was assessed by Bland-Altman plots, and regression analysis was used to evaluate anthropometric measures as proxies for total and abdominal fatness. RESULTS: The percentage of overweight subjects was 41.9%, whereas 55.9% of the subjects were obese, as defined by BMI, and all subjects had a WC exceeding the World Health Organization cut-off point for abdominal obesity. Compared with DXA, the BIA(8) equipment significantly underestimated total %BF (-5.0; -3.6 to -8.5 [mean; 95% confidence interval]), fat mass (-3.6; -3.9 to -3.2), and tr%BF (-8.5; -9.1 to -7.9). The discrepancies between the methods increased with increasing adiposity for both %TBF and tr%BF (both p < 0.001). Variation in BMI explained 28% of the variation in %TBF(DXA) and 51% of %TBF(BIA8). Using WC as a proxy for truncal adiposity, it explained only 18% of tr%BF(DXA) variance and 27% of tr%BF(BIA8) variance. The corresponding figures for truncal fat mass were 49% and 35%, respectively. No significant age effects were observed in any of the regressions. DISCUSSION: BIA(8) underestimated both total and truncal fatness, compared with DXA, with higher dispersion for tr%BF than %TBF. The discrepancies increased with degree of adiposity, suggesting that the accuracy of BIA is negatively affected by obesity.

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  • Single-frequency devices and segmental measures demonstrate the largest differences when compared to DXA, with the inaccuracy increasing in conjunction with higher levels of BMI.

    “However, single-frequency devices and segmental measures demonstrate the largest differences when compared to DXA, with the inaccuracy increasing in conjunction with higher levels of BMI [55,56,57,58].”

    From The Utility of Body Composition Assessment in Nutrition and Clinical Practice: An Overview of Current Methodology (2021) · cites this paper as [55]

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Authors
Neovius, M., Hemmingsson, E., Freyschuss, B., & Uddén, J.
Affiliations
Karolinska University Hospital (SE)
Corresponding author
Neovius, Martin
ORCID
Venue
Obesity
Publisher
Wiley
Published
2006-10
Volume
14
Issue
10
Pages
1731-1738
ISSN
  • 1930-7381 (ISSN-L)
  • 1930-739X
DOI
10.1038/oby.2006.199
OpenAlex
W2045851722
Cited by
119
References
27
Citations by year
2025: 4 · 2024: 4 · 2023: 3 · 2022: 6 · 2021: 6 · 2020: 6 · 2019: 4 · 2018: 7 · 2017: 6 · 2016: 6 · 2015: 3 · 2014: 8 · 2013: 8 · 2012: 9
FWCI
5.32
Type
journal article
Language
en
Open access
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor, 2167 d)
Locations
  • Obesity (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Body Composition Measurement Techniques
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrical and Bioimpedance Tomography
Keywords
bioelectrical impedance analysis, truncal fat, total body fat, abdominal obesity, women, dual-energy X-ray absorptiometry, fat mass, waist circumference, body mass index, adiposity, measurement agreement, fat-free mass
MeSH terms
Adult, Aged, Body Composition, Cross-Sectional Studies, Female, Humans, Middle Aged, Obesity, Reproducibility of Results, Absorptiometry, Photon, Body Mass Index, Electric Impedance, Waist-Hip Ratio, Abdominal Fat, Adiposity

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