Table 3.
Diagnostic performances of FPG, 2 h post-glucose load and HbA1c to diagnose diabetes, using the WHO criteria as the gold standard.
| Diagnostic Criteria | Sensitivity % (95% CI) |
Specificity % (95% CI) |
Positive Predictive Value % (95% CI) |
Negative Predictive Value % (95% CI) |
Accuracy % (95% CI) |
|---|---|---|---|---|---|
| FPG (≥7 mmol/L) | 75.2 (65.9–83.1) | 100 (99.4–100.0) | 100 | 95.9 (94.4–97.0) | 96.4 (94.7–97.6) |
| 2 h Post-Glucose Load (≥11.1 mmol/L) | 77.1 (67.9–84.8) | 100 (99.4–100.0) | 100 | 96.2 (94.7–97.3) | 96.6 (95.0–97.8) |
| HbA1c (≥6.5%, ≥48 mmol/mol) | 75.9 (66.6–83.8) | 83.7 (80.5–86.5) | 44.5 (39.4–49.8) | 95.3 (93.5–96.6) | 82.6 (79.6–85.3) |
| HbA1c (≥6.8%, ≥51 mmol/mol) | 69.2 (59.4–77.9) | 92.1 (89.7–94.1) | 60.2 (52.8–67.1) | 94.6 (92.9–95.9) | 88.8 (86.2–91.0) |
FPG: Fasting Plasma Glucose. HbA1c: Glycated Hemoglobin. WHO: World Health Organization. CI: Confidence Interval.