AHSG and metabolic syndrome: The serum fetuin-A levels were significantly higher in overweight (5.5 ± 1.2 ng/mL), obese without metabolic syndrome (10.7 ± 2.1 ng/mL) and obese with metabolic syndrome (32.9 ± 10.5 ng/mL) groups than in the controls (1.9 ± 0.8 ng/mL) (P<0.001).