Fasting plasma glucose is 100-125 mg/dL or 5.6-6.9 mmol/L (After minimum 8 hour fast) | Yes No Unknown |
Glucose level >=140 mg/dL (7.8 mmol/L) but <200 mg/dL (11.1 mmol/L) 2 hrs after glucose challenge (GTT) w/standardized 75 gram oral load of glucose | Yes No Unknown |
The American Diabetes Association's (ADA) criteria for diagnosing "Impaired Glucose Tolerance" (IGT) or "Impaired Fasting Glucose (IFG)" include:
IGT or IFG, if left untreated, is high risk to develop into type 2 diabetes within 10 years.
References:
The Expert Committee on the Diagnosis and Classification of Diabetes Mellitus.
Report of the Expert Committee on the Diagnosis and Classification of Diabetes Mellitus. Diabetes Care. 1997;20(7):1183-97.
Genuth S, Alberti KG, Bennett P, et al. Follow-up report on the diagnosis of diabetes mellitus. Diabetes Care. 2003;26(11):3160-7.
American Diabetes Association. Diagnosis and classification of diabetes mellitus. Diabetes Care. 2006;29 Suppl 1:S43-8.