GRASP 2 hour glucose, 2 hour glucose in non-diabetics, 2-hour glucose tolerance test, 32,33-split proinsulin in non-diabetics, brachial circumference (male), college completion, fasting blood glucose, fasting blood glucose in high bmi subjects, fasting blood glucose in low bmi subjects, fasting blood glucose in non-diabetics, fasting insulin, fasting insulin in non-diabetics, fasting proinsulin levels in non-diabetics, glycated hemoglobin (hba1c), glycated hemoglobin (hba1c) in nondiabetics, homa-b, homa-b in non-diabetics, homa-ir, insulin processing and secretion, insulinogenic index in non-diabetics, type 2 diabetes, years of education