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https://hdl.handle.net/2440/35733
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Type: | Journal article |
Title: | Comparison of three bioelectrical impedance methods with DXA in overweight and obese men |
Author: | Brinkworth, G. Buckley, J. Noakes, M. Clifton, P. Pateyjohns, I. |
Citation: | Obesity, 2006; 14(11):2064-2070 |
Publisher: | North Amer Assoc Study Obesity |
Issue Date: | 2006 |
ISSN: | 1930-7381 1930-739X |
Statement of Responsibility: | Ian R. Pateyjohns, Grant D. Brinkworth, Jonathan D. Buckley, Manny Noakes and Peter M. Clifton |
Abstract: | <h4>Objective</h4>To compare bioelectrical impedance analysis (BIA) of body composition using three different methods against DXA in overweight and obese men.<h4>Research methods and procedures</h4>Forty-three healthy overweight or obese men (ages 25 to 60 years; BMI, 28 to 43 kg/m(2)) underwent BIA assessment of body composition using the ImpediMed SFB7 (version 6; ImpediMed, Ltd., Eight Mile Plains, Queensland, Australia) in multifrequency mode (Imp-MF) and DF50 single-frequency mode (Imp-SF) and the Tanita UltimateScale (Tanita Corp., Tokyo, Japan). Validity was assessed by comparison against DXA using linear regression and limits of agreement analysis.<h4>Results</h4>All three BIA methods showed good relative agreement with DXA [Imp-MF: fat mass (FM), r(2) = 0.81; fat-free mass (FFM), r(2) = 0.81; percentage body fat (BF%), r(2) = 0.69; Imp-SF: FM, r(2) = 0.65; FFM, r(2) = 0.76; BF%, r(2) = 0.40; Tanita: BF%, r(2) = 0.44; all p < 0.001]. Absolute agreement between DXA and Imp-MF was poor, as indicated by a large bias and wide limits of agreement (bias, +/-1.96 standard deviation; FM, -6.6 +/- 7.7 kg; FFM, 8.0 +/- 7.1 kg; BF%, -7.0 +/- 6.6%). Imp-SF and Tanita exhibited a smaller bias but wide limits of agreement (Imp-SF: FM, -1.1 +/- 8.5 kg; FFM, 2.5 +/- 7.9 kg; BF%, -1.7 +/- 7.3%; Tanita: BF%, 1.2 +/- 9.5%).<h4>Discussion</h4>Compared with DXA, Imp-MF produced large bias and wide limits of agreement, and its accuracy estimating body composition in overweight or obese men was poor. Imp-SF and Tanita demonstrated little bias and may be useful for group comparisons, but their utility for assessment of body composition in individuals is limited. |
Keywords: | Humans Obesity Body Weight Absorptiometry, Photon Body Constitution Body Mass Index Body Height Linear Models Sensitivity and Specificity Reproducibility of Results Body Composition Electric Impedance Adult Middle Aged Male Overweight |
DOI: | 10.1038/oby.2006.241 |
Published version: | http://dx.doi.org/10.1038/oby.2006.241 |
Appears in Collections: | Aurora harvest 6 Obstetrics and Gynaecology publications |
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