Translations:Type 2 diabetes/23/en
Diagnosis
| Condition | 2-hour glucose | Fasting glucose | HbA1c | |||
|---|---|---|---|---|---|---|
| Unit | mmol/L | mg/dL | mmol/L | mg/dL | mmol/mol | DCCT % |
| Normal | < 7.8 | < 140 | < 6.1 | < 110 | < 42 | < 6.0 |
| Impaired fasting glycaemia | < 7.8 | < 140 | 6.1–7.0 | 110–125 | 42–46 | 6.0–6.4 |
| Impaired glucose tolerance | ≥ 7.8 | ≥ 140 | < 7.0 | < 126 | 42–46 | 6.0–6.4 |
| Diabetes mellitus | ≥ 11.1 | ≥ 200 | ≥ 7.0 | ≥ 126 | ≥ 48 | ≥ 6.5 |
The World Health Organization definition of diabetes (both type 1 and type 2) is for a single raised glucose reading with symptoms, otherwise raised values on two occasions, of either:
- fasting plasma glucose ≥ 7.0 mmol/L (126 mg/dL)
- or
- with a glucose tolerance test, two hours after the oral dose a plasma glucose ≥ 11.1 mmol/L (200 mg/dL)
A random blood sugar of greater than 11.1 mmol/L (200 mg/dL) in association with typical symptoms or a glycated hemoglobin (HbA1c) of ≥ 48 mmol/mol (≥ 6.5 DCCT %) is another method of diagnosing diabetes. In 2009 an International Expert Committee that included representatives of the American Diabetes Association (ADA), the International Diabetes Federation (IDF), and the European Association for the Study of Diabetes (EASD) recommended that a threshold of ≥ 48 mmol/mol (≥ 6.5 DCCT %) should be used to diagnose diabetes. This recommendation was adopted by the American Diabetes Association in 2010. Positive tests should be repeated unless the person presents with typical symptoms and blood sugars >11.1 mmol/L (>200 mg/dL).