Prevalence of fatty liver disease, metabolic syndrome, and its components in subjects with different serum alpha-fetoprotein levels. Subjects were classified into two groups according to the median level of serum alpha-fetoprotein (AFP) (3.0 μg/L). Significantly higher prevalence of fatty liver disease, metabolic syndrome, and its components including central obesity, elevated blood pressure (BP), hypertriglyceridemia (hyperTG), and elevated fasting blood glucose (FBG) were observed in subjects with serum AFP ≥ 3.0 μg/L compared with those with serum AFP < 3.0 μg/L. FLD: Fatty liver disease; HDLC: High-density lipoprotein cholesterol; FBG: Fasting blood glucose.