Validation of bioelectrical-impedance analysis as a measurement of change in body composition in obesity.

Abstract

The bioelectrical-impedance-analysis (BIA) method accurately measures body composition in weight-stable subjects. This study validates the use of BIA to measure change in body composition. Twelve obese females underwent weight loss at a mean rate of 1.16 kg/wk. Body composition was measured by deuterium oxide dilution (D2O), BIA, and skinfold anthropometry (SFA) at baseline and at 5% decrements in weight. Highly significant correlations were obtained between D2O and BIA (r = 0.971) and between D2O and SFA (r = 0.932). Overall, BIA predicted change in fat-free mass with greater accuracy (to 0.4 kg) and precision (+/- 1.28 kg) than did anthropometry (to 0.8 kg and +/- 2.58 kg, respectively). We conclude that BIA is a useful clinical method for measuring change in body composition.

• Authors: R F Kushner, A Kunigk, M Alspaugh, P T Andronis, C A Leitch, D A Schoeller
• Journal: The American journal of clinical nutrition (Am J Clin Nutr) Vol. 52 Issue 2 Pg. 219-23 (Aug 1990) ISSN: 0002-9165 [Print] United States
• PMID: 2197849 (Publication Type: Comparative Study, Journal Article)

Topics

• Adult
• Body Composition
• Body Water
• Electric Conductivity
• Female
• Humans
• Middle Aged
• Obesity (physiopathology)
• Radioisotope Dilution Technique
• Weight Loss (physiology)