Quantification of Visceral Fat Using Dual-Energy X-Ray Absorptiometry and Its Reliability According to the Amount of Visceral Fat in Korean Adults

Published on Apr 1, 2015in Journal of Clinical Densitometry2.184
· DOI :10.1016/j.jocd.2015.02.001
Yong Jun Choi11
Estimated H-index: 11
(Ajou University),
Young Kyun Seo1
Estimated H-index: 1
(Ajou University)
+ 1 AuthorsYoon-Sok Chung20
Estimated H-index: 20
(Ajou University)
Abstract Recently, a fully automated method for segmenting abdominal fat into subcutaneous fat and visceral fat (VF) within the android region using dual-energy X-ray absorptiometry (DXA) has been newly developed. The purpose of this study was to validate a new DXA method by comparing it to the gold standard, computed tomography (CT), in the Korean population. Furthermore, we examined its reliability regarding VF and explored whether it is applicable to the Asian population, which has relatively larger amount of VF. We studied 123 adult men and women, aged 22–73 yr, representing a wide range of body mass index values (17.1–36.0 kg/m 2 ), who underwent both DXA and CT in a fasting state within 1 h. The coefficient of determination ( r 2 ) for regression of the CT on DXA values was 0.892 for females, 0.838 for males, and 0.931 combined. Bland-Altman bias was −451.4 cm 3 with 95% limits of agreement of 149.8 to −1052.6 cm 3 . The DXA-measured VF showed a better correlation with CT-measured VF volume than common indices for adiposity, including the body mass index and waist circumference. There was a lesser discrepancy ratio between DXA- and CT-measured VF with an increase of VF volume. DXA, a relatively convenient, inexpensive, and safe method with minimum radiation dosage, can be a reliable technique for VF assessment in the Asian population.
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