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Nutrients 2018, 10(10), 1484; https://doi.org/10.3390/nu10101484

Reliability of Compartmental Body Composition Measures in Weight-Stable Adults Using GE iDXA: Implications for Research and Practice

1
Department of Nutrition, Dietetics & Food, Monash University, Notting Hill 3168, Australia
2
Department of Endocrinology, Department of Medicine, Austin Health, the University of Melbourne, West Heidelberg 3081, Australia
*
Author to whom correspondence should be addressed.
Received: 7 September 2018 / Revised: 5 October 2018 / Accepted: 10 October 2018 / Published: 12 October 2018
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Abstract

The aim of this study was to explore the reliability and precision of body compartment measures, in particular visceral adipose tissue, in weight stable adults over a range of BMIs using GE-Lunar iDXA. Weight-stable participants aged 18–65 years had a total body composition scan on GE-Lunar iDXA either on three separate occasions over a three month period (n = 51), or on a single occasion for duplicate scans with repositioning (n = 30). The coefficient of variation (CV%) and least significant change (LSC) of body compartments were calculated. The CV was higher for all measures over three months (range 0.8–5.9%) compared with same-day precision-scans (all < 2%). The CV for visceral adipose tissue (VAT) was considerably higher than all other body compartments (42.2% three months, 16.2% same day scanning). To accurately measure VAT mass using the GE iDXA it is recommended that participants have a BMI ≥ 25 kg/m2, or VAT mass > 500 g. Changes observed in VAT mass levels below 500 g should be interpreted with caution due to lack of precision and reliability. All other compartmental measures demonstrated good reliability, with less than 6% variation over three months. View Full-Text
Keywords: adiposity; body composition; dual X-ray absorptiometry; visceral adipose tissue adiposity; body composition; dual X-ray absorptiometry; visceral adipose tissue
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Dordevic, A.L.; Bonham, M.; Ghasem-Zadeh, A.; Evans, A.; Barber, E.; Day, K.; Kwok, A.; Truby, H. Reliability of Compartmental Body Composition Measures in Weight-Stable Adults Using GE iDXA: Implications for Research and Practice. Nutrients 2018, 10, 1484.

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