How is the diagnosis established ?
Diabetes is currently defined by fasting blood sugars above 125, blood sugars 2 hours after a meal above 200, or hemoglobin A1c (6-week sugar average) above 6.
4%. In prediabetes fasting blood sugar is 100-125 and 2-hour sugars are 140-200. A1c levels for prediabetes are typically 5.7-6.4%.