guidelines.diabetes.ca | 1-800-BANTING (226-8464) | diabetes.ca Copyright © 2013 Canadian Diabetes Association A1C Level and Future Risk of Diabetes: Systematic Review A1C Category (%) 5-year incidence of diabetes 5.0-5.5<5 to 9% 5.5-6.09 to 25% 6.0-6.525 to 50% Zhang X et al.