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KMID : 0978920060070020225
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Korean Journal of Clinical Geriatrics
2006 Volume.7 No. 2 p.225 ~ p.237
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Correlation between Abdominal Fat Measured by BIA and Fat CT
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Oh Young-A
Shim Kyung-Won
Lee Hong-Soo
Lee Sang-Wha
Kim Soo-A
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Abstract
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Background: Abdominal obesity is strongly associated with the metabolic complications of obesity, and increased visceral fat appears to be even more predictive of some of the adverse health consequences of obesity. Therefore, more convenient and precise methods have been developed to assess visceral fat. Fat CT is used as the gold standard for measuring abdominal fat. However, this method suffers the major drawbacks of cost and being time-consuming. An easier alternative in clinical settings is bioelectrical impedance analysis (BIA). So far, no study has been done to validate BIA measurement. The aim of this study was to find out the correlation between abdominal fat measured
by BIA and fat CT. Secondly, this study investigates whether abdominal fat measured with CT can be optimally estimated by BIA in combination with anthropometric measures.
Methods: 357 participants were enrolled. They were volunteers from a health promotion center and a obesity clinic in a general hospital in Seoul, aged between 16 to 72 years. Height, weight, waist circumference, and hip circumference were measured. Body composition was assessed with BIA and fat CT. We examined the association of anthropometric and BIA measurements with abdominal fat assessed by CT.
Results: All BIA and anthropometric measurements were strongly correlated with total abdominal fat area by CT (P＜0.0001). Total fat mass by BIA had the strongest correlation with total abdominal fat area by CT in male and female participants (r=0.82). Total fat mass measured by BIA had a moderate correlation with visceral fat on CT scan, whereas percentage of body fat assessed with BIA showed a weak correlation (r=0.24). The correlation was strong in the age groups of 10s∼50s, but in the young women, the correlation was weak. A combination of anthropometric measurement and BIA were strongly associated with the abdominal fat assessed by CT scan, rather than either method alone. Total fat
mass by BIA and waist circumference were high explained variances.
Conclusion: The correlation between total fat mass by BIA and CT was strong, but visceral fat assessed by CT and BIA did not show a strong correlation. For the evaluation of obesity, anthropometric measurements and CT have a practical advantage compared to BIA in elderly or obese young women.
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KEYWORD
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Bioelectrical impedance analysis (BIA), Fat CT, Abdominal fat, Anthropometry, Total body fat mass
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