Comparison of body composition assessment by DXA and BIA according to the body mass index: A retrospective study on 3655 measures
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Open Access
- 12 July 2018
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 13 (7), e0200465
- https://doi.org/10.1371/journal.pone.0200465
Abstract
Body composition assessment is often used in clinical practice for nutritional evaluation and monitoring. The standard method, dual-energy X-ray absorptiometry (DXA), is hardly feasible in routine clinical practice contrary to Bioelectrical Impedance Analysis (BIA) method. We thus aimed to compare body composition assessment by DXA and BIA according to the body mass index (BMI) in a large cohort. Retrospectively, we analysed DXA and BIA measures in patients followed in a Nutrition Unit from 2010 to 2016. Body composition was assessed under standardized conditions in the morning, after a fasting period of 12 h, by DXA (Lunar Prodigy Advance) and BIA (Bodystat QuadScan 4000, Manufacturer’s equation). Bland-Altman test was performed for each class of BMI (kg/m2) and fat mass and fat free mass values were compared using Kruskal-Wallis test. Pearson correlations were also performed and the concordance coefficient of Lin was calculated. Whatever the BMI, BIA and DXA methods reported higher concordance for values of FM than FFM. Body composition values were very closed for patients with BMI between 16 and 18,5 (difference < 1kg). For BMI > 18,5 and BMI < 40, BIA overestimated fat free mass from 3,38 to 8,28 kg, and underestimated fat mass from 2,51 to 5,67 kg compared with DXA method. For BMI ≥ 40, differences vary with BMI. For BMI < 16, BIA underestimated fat free mass by 2,25 kg, and overestimated fat mass by 2,57 kg. However, limits of agreement were very large either for FM and FFM values, irrespective of BMI. The small bias, particularly in patients with BMI between 16 and 18, suggests that BIA and DXA methods are interchangeable at a population level. However, concordance between BIA and DXA methods at the individual level is lacking, irrespective of BMI.Keywords
This publication has 50 references indexed in Scilit:
- Changes in body composition during weight loss in obese subjects in the NUGENOB study: Comparison of bioelectrical impedance vs. dual-energy X-ray absorptiometryDiabetes & Metabolism, 2011
- Anorexia nervosa and nutritional assessment: contribution of body composition measurementsNutrition Research Reviews, 2011
- Comparison of DXA and CT in the Assessment of Body Composition in Premenopausal Women With Obesity and Anorexia NervosaObesity, 2010
- Bioelectrical impedance phase angle in constitutionally lean females, ballet dancers and patients with anorexia nervosaEuropean Journal of Clinical Nutrition, 2008
- Assessment methods in human body compositionCurrent Opinion in Clinical Nutrition and Metabolic Care, 2008
- Good agreement between bioelectrical impedance and dual-energy X-ray absorptiometry for estimating changes in body composition during weight loss in overweight young womenClinical Nutrition, 2007
- Body water distribution in severe obesity and its assessment from eight-polar bioelectrical impedance analysisEuropean Journal of Clinical Nutrition, 2004
- Comparison of bioelectrical impedance analysis and dual-energy X-ray absorptiometry for the assessment of appendicular body composition in anorexic womenEuropean Journal of Clinical Nutrition, 2003
- 3D Versus 2D UltrasoundInvestigative Radiology, 2002