Diagnostic criteria for type 2 diabetes mellitus
| Diagnostic methods | Venous plasma glucose level (mmol/L) |
| Typical symptoms of diabetes plus random blood glucose testing | ≥11.1 |
| or | |
| Plus fasting plasma glucose | ≥7.0 |
| or | |
| Plus 2 hour blood glucose after the OGTT | ≥11.1 |
| or | |
| Plus HbA1c | ≥6.5% |
| Individuals who do not present diabetes symptoms should be re-tested on a separate day |
Note: Typical symptoms of diabetes include polydipsia, polyuria, polyphagia and weight loss; random blood glucose refers to the blood glucose level at any time of day regardless of the time of the last meal, which cannot be used to diagnose impaired fasting glucose or impaired glucose tolerance; The fasting state refers to not eating for at least 8 hours.
HbA1c, glycated haemoglobin; OGTT, oral glucose tolerance test.