The MetS is diagnosed according to the National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III) criteria in 2003 [11], which was defined by the presence of three or more of the five individual components listed below: (1) waist circumference for abdominal obesity: men ≥102 cm or women ≥88 cm; (2) elevated triglycerides (≥1.7 mmol/L); (3) lower HDL-C (men