Regional Fat Measured by DEXA and Metabolic Risk Factors among Women with Central Obesity

ABSTRACT

BACKGROUND: This study was carried out to determine the usefulness of regional body fat measured by dual energy X-ray absorptiometry (DEXA) by examining the relationship between regional body fat and metabolic risk factors. METHODS: A total of 98 women aged 18~65 years with central obesity (waist circumference > or =80 cm) took the evaluation for metabolic risk factors (blood pressure, fasting glucose, insulin, high sensitive c-reactive protein (hs-CRP), lipid profile, homeostasis model assessment of insulin resistance (HOMA-IR)) and the anthropometric measurement, and regional body fat measurement using DEXA. The relationship of regional body fat with the metabolic risk factors, the metabolic syndrome (MS) defined by the International Diabetes Federation and insulin resistance (IR, defined by HOMA-IR> or =2.48) were assessed. The analyses were conducted using regression and logistic regression analyses. RESULTS: After adjustment for age and total body fat (%), legs fat (%) was significantly and negatively associated with LDL-C, triglyceride, HOMA-IR, and hs-CRP, while positively with HDL-C. The 1% increase of legs fat was associated with the MS by odds ratio of 0.82 (95% C.I 0.71~0.96) and with the IR by odds ratio of 0.80 (95% C.I. 0.67~0.95). Trunk fat (%) was significantly and positively associated with LDL-C, triglycerides, and HOMA-IR. The 1% increase of trunk fat was associated with the MS by odds ratio of 1.32 (95% C.I. 1.03~1.71) and with the IR by odds ratio of 1.33 (95% C.I. 1.01~1.77). The ratio of android fat to gynoid fat was significantly and positively associated with LDL-C, triglycerides, glucose, and HOMA- IR, while negatively with HDL-C. The 0.1 increase of the ratio was associated with the MS by odds ratio of 1.66 (95% C.I. 1.07~2.60). CONCLUSION: The trunk fat, and legs fat, the ratio of android fat to gynoid fat assessed by DEXA seemed to be useful indicators to predict the metabolic risk factors in women with central obesity.