GPT and type 2 diabetes mellitus: Compared with participants in quartile 1 which had the lowest BMI, participants in quartile 4 were older, heavier, more likely to be male, had bigger waist circumference, higher total cholesterol, higher triglycerides, HbA1c, AST, ALT, GGT, blood pressures and fasting plasma glucose, more had fatty liver and incident T2DM, more smokers, more drinker.