Table 3. Criteria of fasting plasma glucose levels and 75 g oral glucose tolerance test 2‐h value.
| Normal range | Diabetic range | |
|---|---|---|
| Fasting value | <110 mg/dL (6.1 mmol/L) | ≥126 mg/dL (7.0 mmol/L) |
| 75 g OGTT 2‐h value | <140 mg/dL (7.8 mmol/L) | ≥200 mg/dL (11.1 mmol/L) |
| Evaluation of OGTT | Normal type: If both values belong to normal range | *Diabetic type: If any of the two values falls into diabetic range |
| Borderline type Neither normal nor diabetic types | ||
*Casual plasma glucose ≥200 mg/dL (≥11.1 mmol/L) and HbA1c≥6.5% are also regarded as to indicate diabetic type.
Even for normal type, if 1‐h value is 180 mg/dL (10.0 mmol/L), the risk of progression to diabetes mellitus is greater than for <180 mg/dL (10.0 mmol/L) and should be treated as with borderline type (follow‐up observation, etc.). Fasting plasma glucose level of 100–109 mg/dL (5.5–6.0 mmol/L) is called ‘high‐normal’: within the range of normal fasting plasma glucose.
Plasma glucose level after glucose load in oral glucose tolerance test (OGTT) is not included in casual plasma glucose levels. The value for HbA1c (%) is indicated with 0.4% added to HbA1c (JDS) (%).