Table 1.

Classification of Abnormal Glucose Metabolism Based on the 2-Hour Oral Glucose Tolerance Test, Which Consists of Fasting Blood Glucose Level and Blood Glucose Level Measured 2 Hours after a 75-g Oral Glucose Load4

DiagnosisFasting Glucose (mg/dL)2-Hour Post Load Glucose (mg/dL)
Normal glucose metabolism<110and<140
Impaired fasting glucose110–125and<140
Impaired glucose tolerance<126and140–199
Diabetes mellitus≥126or≥200