Table 3.
The values of HbA1c combined with HCT to detect GDM diagnosed
| Cut point (%) | Sensitivity | Specificity | Youden index | PPV | NPV |
|---|---|---|---|---|---|
| 4.25 | 0.978 | 0.034 | 0.011 | 0.203 | 0.857 |
| 4.35 | 0.956 | 0.056 | 0.011 | 0.203 | 0.833 |
| 4.45 | 0.911 | 0.117 | 0.028 | 0.206 | 0.84 |
| 4.55 | 0.867 | 0.173 | 0.04 | 0.209 | 0.838 |
| 4.65 | 0.8 | 0.313 | 0.113 | 0.226 | 0.862 |
| 4.75 | 0.733 | 0.441 | 0.175 | 0.248 | 0.868 |
| 4.85 | 0.556 | 0.57 | 0.125 | 0.245 | 0.836 |
| 4.95 | 0.356 | 0.743 | 0.099 | 0.258 | 0.821 |
| 5.05 | 0.289 | 0.883 | 0.172 | 0.382 | 0.832 |
| 5.15 | 0.2 | 0.933 | 0.133 | 0.429 | 0.823 |
| 5.25 | 0.133 | 0.966 | 0.1 | 0.5 | 0.816 |
| 5.35 | 0.089 | 0.994 | 0.083 | 0.8 | 0.813 |
| 5.5 | 0.089 | 1 | 0.089 | 1 | 0.814 |
| 5.65 | 0.044 | 1 | 0.044 | 1 | 0.806 |
| 5.8 | 0.022 | 1 | 0.022 | 1 | 0.803 |
PPV positive predictive value, NPV negative predictive value