Plasma Glucose Criteria for the Diagnosis of Impaired Glucose Tolerance and Diabetes

Plasma GlucoseNormalImpairedDiabetes
Fasting<100 mg/dL100–125 mg/dL (IFG)≥126 mg/dL
Oral glucose-tolerance test, 2 h PG<140 mg/dL140–199 mg/dL (IGT)≥200 mg/dL
Casual≥200 mg/dL + symptoms*
  • IFG indicates impaired fasting glucose; 2 h PG, plasma glucose at 2 hours postingestion of glucose; IGT, impaired glucose.

  • * Polyuria, polydipsia, weight loss