Cited by 115Body Composition Measurement TechniquesObesity, Physical Activity, DietBone health and osteoporosis research

Underestimation of percentage fat mass measured by bioelectrical impedance analysis compared to dual energy X-ray absorptiometry method in obese children

Eisenkölbl, J, Kartasurya, M, Widhalm, K·2001·European Journal of Clinical Nutrition

Abstract

Objective The aim of the study was to investigate whether there is a difference between body fat mass percentage measured by BIA and DXA method.Design Transversal study, randomized.Setting Lipid and Obesity Outpatient Clinic, Department of Pediatrics, University of Vienna, Austria.Subjects Twenty-seven children and adolescents from the Lipid and Obesity Outpatient Clinic, Department of Pediatrics, University of Vienna, were included in the study (14 boys and 13 girls between 6 and 18 y; mean age 12.6 and 13.1 y).Methods The body fat percentage was measured with BIA (bioelectrical impedance analyzer BIA 2000-M) and DXA (dual energy X-ray absorptiometry) methods on the same day.Results The mean difference between the body fat mass percentage measured by BIA and DXA was 4.48 with a standard deviation of 2.93. The results measured by BIA were almost always lower than that by DXA by about 12%. The lower and upper limit of the difference in 95% confidence interval was -5.64 and -3.32. By paired t-test, these results were significantly different (P<0.001). The correlation between the two measurements was 0.826. The mean percentage of body fat mass measured by BIA was 34.86+/-7.08% and by DXA 39.75+/-5.63%. The differences were not changed by age and body fat percentage but they were by sex.Conclusions The results of the study show that the body fat percentages measured by BIA and DXA method were significantly different. This is very important because BIA technique is a routine technique for clinical purposes. Adjustments to the formula used for calculating the total fat mass in obese children and adolescence are necessary. Underestimation of body fat percentage measured by bioelectrical impedance analysis compared to dual X-ray absorptiometry method in obese children is three times higher with boys than with girls.

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Crossref · 10.1038/sj.ejcn.1601184

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Authors
Eisenkölbl, J., Kartasurya, M., & Widhalm, K.
Affiliations
University of Vienna (AT)
Corresponding author
Widhalm, K
Venue
European Journal of Clinical Nutrition
Published
2001-06-01
Volume
55
Issue
6
Pages
423-429
ISSN
  • 0954-3007 (ISSN-L)
  • 1476-5640
OpenAlex
W2046644515
Cited by
115
References
16
Citations by year
2025: 2 · 2024: 1 · 2023: 2 · 2022: 1 · 2021: 4 · 2020: 2 · 2019: 4 · 2018: 8 · 2017: 4 · 2016: 3 · 2015: 9 · 2014: 6 · 2013: 9 · 2012: 6
FWCI
2.79
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Clinical Nutrition (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
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
Keywords
bioelectrical impedance analysis, dual-energy X-ray absorptiometry, body fat percentage, childhood obesity, adolescents, obesity screening, sex differences, method comparison
MeSH terms
Adolescent, Body Composition, Child, Female, Humans, Male, Obesity, Sex Factors, Reproducibility of Results, Absorptiometry, Photon, Body Mass Index, Electric Impedance

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