| TEST | Pre-diabetes | Diagnosed | Target | COMMENTS |
| Glycosylated hemoglobin A1c (HbA1c) | 5.7% - 6.4% | ≥6.5 | ≤7% | · Shows the average level of glucose over the previous 3 months. · The A1C test should be performed using a method that is certified by the NGSP and standardized or traceable to the DCCT reference assay. · A1C levels may vary with patients’ race/ethnicity |
| Fasting plasma glucose (FPG) | 100 - 125 mg/dl (5.6mmol/L - 6.9 mmol/L) | ≥126 mg/dl (7 mmol/L) | 70 - 130 mg/dl (3.9 - 7.2 mmol/L) | · Patient should be fast for at least 8 hours before the test. |
| Oral glucose tolerance test (OGTT) | 140 - 199 mg/dl (7.8 mmol/L - 11.0 mmol/L) | ≥200 mg/dl (11.1 mmol/L) | 180 mg/dl (10.0 mmol/L) | · Use to measure patient’s ability to utilize glucose at certain time. · Patient should be fast to perform 2-hours after 75 gram of glucose drink. For pregnant women use 100 gram of glucose test. · Recommended in gestational diabetes patient. |
| Random plasma glucose | - | ≥200 mg/dl (11.1 mmol/L) | - | · Perform at any time of the day. |