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Single slice vs. volumetric MR assessment of visceral adipose tissue: reliability and validity among the overweight and obese.

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Authors
Maislin, Greg
Ahmed, Murtuza M
Gooneratne, Nalaka
Thorne-Fitzgerald, Matt
Kim, Christopher
Teff, Karen
Arnardottir, Erna S
Benediktsdottir, Bryndis
Einarsdottir, Hildur
Juliusson, Sigurdur
Pack, Allan I
Gislason, Thorarinn
Schwab, Richard J
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Issue Date
2012-10

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Citation
Obesity (Silver Spring) 2012, 20(10):2124-32
Abstract
Visceral adipose tissue (VAT) is associated with abnormal cardiovascular and metabolic profiles. Total VAT volume of the abdominal compartment by magnetic resonance imaging (MRI) is the gold-standard measurement for VAT but is costly and time consuming. Prior studies suggest VAT area on a single slice MR image may serve as a surrogate for total VAT volume but it is unknown if this relationship is maintained in overweight and obese men and women. Untreated sleep apnea subjects enrolled into the Icelandic Sleep Apnea Cohort (ISAC) underwent abdominal MRI. VAT area and subcutaneous adipose tissue (SAT) area at the L2-L3 and L4-L5 interspaces and total VAT and SAT volumes were determined by manual examination using image analysis software; 539 men and 129 women with mean ages of 54.1 and 58.8 years and mean BMI of 32.2 kg/m(2) and 33.7 kg/m(2), respectively, were studied. Mean total VAT volume was 40% smaller and mean total SAT was 25% larger among females compared with males. The correlation with VAT volume was significantly larger for L2-L3 VAT area (r = 0.96) compared to L4-L5 VAT area (r = 0.83). The difference in correlation coefficients was statistically significant (nonparametric bootstrap P < 0.001 with 95% confidence interval (CI) for the difference from 0.11 to 0.15. VAT area at L2-L3 was also significantly better correlated with VAT volume than traditional anthropometric variables. Linear regression analyses demonstrated that L2-L3 area alone was sufficient for predicting total VAT volume and that the nature of the linear association was maintained across all levels of obesity and in both genders.
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Additional Links
http://dx.doi.org/10.1038/oby.2012.53
http://onlinelibrary.wiley.com/doi/10.1038/oby.2012.53/pdf
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3743719/
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Archived with thanks to Obesity (Silver Spring, Md.)
ae974a485f413a2113503eed53cd6c53
10.1038/oby.2012.53
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English Journal Articles (Peer Reviewed)

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