Table 2.
Diagnostic indices of various criteria using HbA1c or fasting blood glucose to detect abnormal glucose tolerance
| Diagnostic test | na | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) |
|---|---|---|---|---|---|
| HbA1c ≥5.7% (≥39 mmol/mol) | 26 | 29.5 | 95.2 | 88.5 | 51.8 |
| FBG ≥5.6 mmol/l | 49 | 62.8 | 100.0 | 100.0 | 68.1 |
| HbA1c ≥5.7% (≥39 mmol/mol) or FBG ≥5.6 mmol/l | 55 | 66.7 | 95.2 | 94.5 | 69.4 |
| HbA1c ≥6.0% (≥42 mmol/mol) | 17 | 21.8 | 100.0 | 100.0 | 50.4 |
| HbA1c ≥6.0% (≥42 mmol/mol) or FBG ≥5.6 mmol/l | 51 | 65.4 | 100.0 | 100.0 | 69.7 |
| HbA1c ≥5.0% (≥31 mmol/mol) | 103 | 83.3 | 38.7 | 63.1 | 64.9 |
| HbA1c ≥5.0% (≥31 mmol/mol) or FBG ≥5.6 mmol/l | 108 | 89.7 | 38.7 | 64.8 | 75.0 |
FBG, fasting blood glucose; PPV, positive predictive value; NPV, negative predictive value.
a
Number of women who met cut-off values.