Table 4.
Sensitivity, specificity, positive and negative predictive values, positive and negative likelihood ratios, and accuracy for detecting prediabetes defined by OGTT.
| HbA1c (%) | Sensitivity (%) | Specificity (%) | Youden index | Positive predictive value (%) | Negative predictive value (%) | Positive likelihood ratio | Negative likelihood ratio | Accuracy |
|---|---|---|---|---|---|---|---|---|
| ≧5.3 | 92.0 | 25.4 | 0.17 | 44.1 | 83.3 | 1.2 | 0.3 | 51.4 |
| ≧5.4 | 91.4 | 26.0 | 0.17 | 44.2 | 82.6 | 1.2 | 0.3 | 51.6 |
| ≧5.5 | 85.5 | 40.7 | 0.26 | 47.9 | 81.3 | 1.4 | 0.4 | 58.1 |
| ≧5.6 | 71.1 | 56.5 | 0.28 | 51.1 | 75.3 | 1.6 | 0.5 | 62.2 |
| ≧5.7 | 60.6 | 72.1 | 0.33 | 58.1 | 74.0 | 2.2 | 0.5 | 67.6 |
| ≧5.8 | 49.0 | 83.2 | 0.32 | 65.1 | 71.8 | 2.9 | 0.6 | 69.8 |
| ≧5.9 | 34.9 | 89.8 | 0.25 | 68.6 | 68.3 | 3.4 | 0.7 | 68.4 |
| ≧6.0 | 22.5 | 94.1 | 0.17 | 71.1 | 65.5 | 3.8 | 0.8 | 66.2 |
| ≧6.1 | 13.5 | 98.0 | 0.12 | 81.0 | 63.9 | 6.6 | 0.9 | 65.0 |
| ≧6.2 | 8.4 | 99.2 | 0.08 | 87.5 | 62.8 | 10.9 | 0.9 | 63.8 |