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

Nutrients

Maxine Bonham¹  Alastair Kwok¹  Alison Evans¹  Elizabeth Barber²  Kaitlin Day³  Ali Ghasem-Zadeh³  Helen Truby³  AimeeL. Dordevic³ 

[1] Food, Monash University, Notting Hill 3168, Australia;Department of Endocrinology, Department of Medicine, Austin Health, the University of Melbourne, West Heidelberg 3081, Australia;;Department of Nutrition, Dietetics &

关键词: adiposity;    body composition;    dual X-ray absorptiometry;    visceral adipose tissue;   

DOI  :  10.3390/nu10101484

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown