MEASURED BY glycosylated hemoglobin A1c (HbA1c), poor diabetic metabolic control correlates with the complications such as nephropathy, as demonstrated in two important studies, the Diabetes Control and Complications Trial and the U.K. Prospective Diabetes Study. Therefore, it should come as no surprise that inadequate glycemic control in diabetic patients not on dialysis is associated with greater macrovascular complications, including MI, stroke, and peripheral vascular disease.