Comparison of dual-energy X-ray absorptiometry, air displacement plethysmography and bioelectrical impedance analysis for the assessment of body composition in morbidly obese women

G. Bedogni, F. Agosti, A. De Col, N. Marazzi, A. Tagliaferri, A. Sartorio

Research output: Contribution to journalArticle

Abstract

Background/Objectives: We evaluated the agreement of air displacement plethysmography (ADP) and bioelectrical impedance analysis (BIA) with dual-energy X-ray absorptiometry (DXA) for the assessment of percent fat mass (%FM) in morbidly obese women. Subjects/Methods: Fifty-seven women aged 19-55 years and with a body mass index (BMI) ranging from 37.3 to 55.2 kg/m 2 were studied. Values of %FM were obtained directly from ADP and DXA, whereas for BIA we estimated fat-free mass (FFM) from an equation for morbidly obese subjects and calculated %FM as (weight-FFM)/weight. Results: The mean (s.d.) difference between ADP and DXA for the assessment of %FM was -2.4% (3.3%) with limits of agreement (LOA) from -8.8% to 4.1%. The mean (s.d.) difference between BIA and DXA for the assessment of %FM was 1.7% (3.3%) with LOA from -4.9% to 8.2%. Conclusion: ADP-DXA and BIA-DXA are not interchangeable methods for the assessment of body composition in morbidly obese women.

Original languageEnglish
Pages (from-to)1129-1132
Number of pages4
JournalEuropean Journal of Clinical Nutrition
Volume67
Issue number11
DOIs
Publication statusPublished - Nov 2013

Keywords

  • Air displacement plethysmography
  • Bioelectrical impedance analysis
  • Body composition
  • Dual energy X-ray absorptiometry
  • Obesity

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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