In vivo precision of the GE Lunar iDXA densitometer for the measurement of total body composition and fat distribution in adults
- 15 September 2010
- journal article
- Published by Springer Nature in European Journal of Clinical Nutrition
- Vol. 65 (1), 140-142
- https://doi.org/10.1038/ejcn.2010.190
Abstract
In vivo precision for body composition measurements using dual energy X-ray absorptiometry (DXA; GE Lunar iDXA, GE Healthcare, Bucks, UK) was evaluated in 52 men and women, aged 34.8 (s.d. 8.4; range 20.1–50.5) years, body mass index (25.8 kg/m2; range 16.7–42.7 kg/m2). Two consecutive total body scans (with re-positioning) were conducted. Precision was excellent for all measurements, particularly for total body bone mineral content and lean tissue mass (root mean square 0.015 and 0.244 kg; coefficients of variation (CV) 0.6 and 0.5%, respectively). Precision error was CV 0.82% for total fat mass and 0.86% for percentage fat. Precision was better for gynoid (root mean square 0.397 kg; CV 0.96%) than for android fat distribution (root mean square 0.780 kg, CV 2.32%). There was good agreement between consecutive measurements for all measurements (slope (s.e.) 0.993–1.002; all R2=0.99). The Lunar iDXA provided excellent precision for total body composition measurements. Research into the effect of body size on the precision of DXA body fat distribution measurements is required.Keywords
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