Purpose: To determine optimal cutoff values for preperitoneal fat thickness measured by ultrasonography as indicators for obesity-related disorders.
Methods: We studied 276 men aged 60 ± 13 years and 307 women aged 64 ± 11 years. Participants were consecutively enrolled from inpatients aged ≤75 years. Demographic data were collected and maximal preperitoneal fat thickness (PFTmax) and carotid intima-media thickness were evaluated on B-mode ultrasonography. Receiver operating characteristic (ROC) curve analysis was performed to determine optimal cutoff values for PFTmax.
Results: Multiple regression analysis using one or more obesity-related disorders as an objective variable showed that the tertile on the basis of PFTmax was a significant independent contributing factor in both men and women. Receiver operating characteristic curve analysis identified the cutoff points of 6.1 mm for PFTmax in men (sensitivity, 66.7%; specificity, 62.5%) and 8.7 mm for PFTmax in women (sensitivity, 56.6%; specificity, 63.6%) as discriminator values corresponding to the presence of one or more obesity-related disorders. Using the new criteria to diagnose visceral obesity, we found that adjusted carotid intima-media thickness was significantly higher in men and women with visceral obesity and two or more obesity-related disorders than in those without them.
Conclusions: These findings suggested that PFTmax measured on ultrasonography was useful in screening for indicators of cardiovascular risk factors.
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