Characteristics of seven cohort prospective studies enrolled in meta-analysis.

*represented the number of MetS occurrence in prospective studies. Abbreviations: AHA/NHLB: American Heart Association/National Heart, Lung, and Blood Institute; AIR: Acute insulin response; ALP: Alkaline phosphatase; ALT: Alanine aminotransferase; AST: Aspartate aminotransferase; BMI: Body mass index; F: Female; GGT: Gamma-glutamyltransferase; HOMA-IR: Homeostasis model assessment index of insulin resistance; IDF: International Diabetes Federation; IGT: Impaired glucose tolerance; M: Male; MetS: Metabolic syndrome; NCEP-ATPIII: The Adult Treatment Panel III of the National Cholesterol Education Program; SD: Standard deviation; Si: Insulin sensitivity; VS.: Versus; WBC: White blood cell.