Agreement of bioelectrical impedance with dual-energy X-ray absorptiometry and MRI to estimate changes in body fat, skeletal muscle and visceral fat during a 12-month weight loss intervention
Open Access
- 31 August 2012
- journal article
- research article
- Published by Cambridge University Press (CUP) in British Journal of Nutrition
- Vol. 109 (10), 1910-1916
- https://doi.org/10.1017/s0007114512003698
Abstract
The aim of the present study was to analyse the agreement of bioelectrical impedance analysis (BIA) compared with dual-energy X-ray absorptiometry (DXA) and MRI in estimating body fat, skeletal muscle and visceral fat during a 12-month weight loss intervention. A total of nineteen obese adults (twelve females, seven males) aged 20·2–48·6 years, mean BMI 34·6 (se 0·6) kg/m2, participated in the study. Body fat, skeletal muscle and visceral fat index were measured by BIA (Omron BF-500; Omron Medizintechnik) and compared with DXA (body fat and skeletal muscle) at baseline, 5 and 12 months, and with MRI (visceral fat) at baseline and 5 months. The subjects lost 8·9 (se 1·8) kg (9·0 (se 1·7) %) of body weight during the 12-month intervention. BIA, as compared to DXA, accurately assessed loss of fat (7·0 (se 1·5) v. 7·0 (se 1·4) kg, P= 0·94) and muscle (1·0 (se 0·2) v. 1·4 (se 0·3) kg, P= 0·18). While body fat was similar by the two methods, skeletal muscle was underestimated by 1–2 kg using BIA at each time point. Compared to MRI, BIA overestimated visceral fat, especially in males. BIA and DXA showed high correlations for kg fat, both cross-sectionally and longitudinally (r 0·91–0·99). BIA, compared with DXA and MRI, detected kg muscle and visceral fat more accurately cross-sectionally (r 0·77–0·87 and r 0·40–0·78, respectively) than their changes longitudinally (r 0·24–0·61 and r 0·46, respectively). BIA is at its best when assessing the amount or changes in fat mass. It is a useful method for measuring skeletal muscle, but limited in its ability to measure visceral fat.Keywords
This publication has 16 references indexed in Scilit:
- Validity of a New Abdominal Bioelectrical Impedance Device to Measure Abdominal and Visceral Fat: Comparison With MRIObesity, 2010
- Validity of Bioelectrical Impedance Analysis to Estimate Body Composition Changes After Bariatric Surgery in Premenopausal Morbidly WomenObesity Surgery, 2009
- Accuracy of Bioelectrical Impedance Consumer Devices for Measurement of Body Composition in Comparison to Whole Body Magnetic Resonance Imaging and Dual X-Ray AbsorptiometryObesity Facts, 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
- Validity of the leg-to-leg bioimpedance to estimate changes in body fat during weight loss and regain in overweight women: a comparison with multi-compartment modelsInternational Journal of Obesity, 2006
- The Fisher-Pitman Permutation Test When Testing for Differences in Mean and VariancePsychological Reports, 2004
- Total-body skeletal muscle mass: estimation by a new dual-energy X-ray absorptiometry methodThe American Journal of Clinical Nutrition, 2002
- Use of the leg-to-leg bioelectrical impedance method in assessing body-composition change in obese womenThe American Journal of Clinical Nutrition, 1999
- Physiological responses to slimmingProceedings of the Nutrition Society, 1991
- STATISTICAL METHODS FOR ASSESSING AGREEMENT BETWEEN TWO METHODS OF CLINICAL MEASUREMENTThe Lancet, 1986