Model 1:	age, fasting glucose group, age*fasitng glucose group (interaction term)
Model 2:	Model 1 + adjustment for gender, race, body mass index (BMI), mean arterial pressure, use of anti-hypertensive medication, LDL, HDL, Triglycerides, use of lipid-lowering medications, smoking history, pack years, creatinine and C-reactive protein levels (CRP).