Criteria for the diagnosis of diabetes mellitus

NormoglycemiaIFG and IGTDiabetes mellitus*
FPG <100 mg/dlFPG ≥100 mg/dl and <126 mg/dl (IFG)FPG ≥126 mg/dl
2-h PG <140 mg/dl2-h PG ≥140 mg/dl and <200 mg/dl (IGT)2-h PG ≥200 mg/dl
Symptoms of DM and casual plasma glucose concentration ≥200 mg/dl
  • DM, diabetes mellitus; FPG, fasting plasma glucose; 2-h PG, 2-h postload glucose.

  • *

    * In the absence of unequivocal hyperglycemia, a diagnosis of diabetes must be confirmed on a subsequent day by any one of the three methods included in the chart. In clinical settings, the FPG test is greatly preferred because of ease of administration, convenience, acceptability to patients, and lower cost. Fasting is defined as no calorie intake for at least 8 h.

  • This test requires the use of a glucose load containing the equivalent of 75 g anhydrous glucose dissolved in water.