It is recommended that those with three or more of the following are considered to have metabolic syndrome: 1. abdominal obesity: waist circumference greater than 90 cm for men and 85 cm for women; 2. blood triglycerides (TG): greater than 1.7 mmol/l; 3. blood HDL-C less than 1.01 mmol/l; 4. blood pressure greater than 130/85 mmHg; 5. fasting blood glucose greater than 6.1mmol/l or 2 hours postprandial blood glucose greater than 7.8mmol/l or history of diabetes.