Diagnostic Thresholds
Medical consensus relies on highly precise blood metrics to screen for and confirm a diabetes diagnosis. The standard criteria include:
| Metric / Test | Normal | Prediabetes | Diabetes |
|---|---|---|---|
| Fasting Plasma Glucose (FPG) | < 100 mg/dL | 100 – 125 mg/dL | ≥ 126 mg/dL |
| 2-Hour Oral Glucose Tolerance Test (OGTT) | < 140 mg/dL | 140 – 199 mg/dL | ≥ 200 mg/dL |
| Hemoglobin A1c (HbA1c) | < 5.7% | 5.7% – 6.4% | ≥ 6.5% |
| Random Blood Glucose | — | — | ≥ 200 mg/dL (with symptoms) |