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

• Published in: The American journal of clinical nutrition Vol. 52; no. 2; pp. 219 - 223
• Main Authors: Kushner, RF, Kunigk, A, Alspaugh, M, Andronis, PT, Leitch, CA, Schoeller, DA
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.08.1990
• Subjects: ADIPOSE TISSUE; adipose tissues; Adult; agua metabolica; ANIMAL TISSUES; BASIC BIOLOGICAL SCIENCES; BIOELECTRICITY; BODY; BODY COMPOSITION; body fat; Body Water; chemicophysical properties; CONNECTIVE TISSUE; DEUTERIUM; eau metabolique; Electric Conductivity; electric potential; ELECTRICITY; Female; femme; Humans; HYDROGEN COMPOUNDS; HYDROGEN ISOTOPES; impedance; ISOTOPE APPLICATIONS; ISOTOPES; lean body mass; LIGHT NUCLEI; measurement; medicion; mesure; metabolic water; Middle Aged; mujeres; NUCLEI; obesity; Obesity - physiopathology; ODD-ODD NUCLEI; overweight; OXYGEN COMPOUNDS; perdida de peso; perte de poids; peso; physiology; physiopathology; poids; potencial electrico; potentiel electrique; propiedades fisico quimicas; propriete physicochimique; Radioisotope Dilution Technique; sobrepeso; STABLE ISOTOPES; surpoids; tejido adiposo; TESTING; tissu adipeux; TISSUES 550201 > Biochemistry > Tracer Techniques; TRACER TECHNIQUES; VALIDATION; WATER; weight; Weight Loss; Weight Loss - physiology; weight losses; women
• ISSN: 0002-9165; 1938-3207
• DOI: 10.1093/ajcn/52.2.219

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.