Ogtt values
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ADA Standards of Care 2026 oral glucose tolerance test diagnostic criteria 75 g diabetes prediabetes
75-g OGTT values for nonpregnant adults
| 2-hour plasma glucose | Interpretation |
|---|---|
| <140 mg/dL (<7.8 mmol/L) | Normal glucose tolerance |
| 140-199 mg/dL (7.8-11.0 mmol/L) | Prediabetes, specifically impaired glucose tolerance |
| ≥200 mg/dL (≥11.1 mmol/L) | Diabetes mellitus |
For diagnosis in someone without clear symptoms of high glucose, an abnormal result generally needs confirmation with a repeat test or another diagnostic test. The ADA 2026 criteria use a 75-g glucose load with fasting and 2-hour samples.
Fasting sample, if included:
- <100 mg/dL: normal
- 100-125 mg/dL: impaired fasting glucose / prediabetes
- ≥126 mg/dL: diabetes
Pregnancy OGTT cutoffs are different. Send the fasting, 1-hour, and 2-hour values plus whether this was done during pregnancy, and I can interpret them.
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