Table 4. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of significant clinical and ultrasonographic parameters.
| Variable | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) |
|---|---|---|---|---|
| Basal LH ≥0.1 IU/L | 72.0 | 74.2 | 89.3 | 43.9 |
| Basal FSH ≥2.4 IU/L | 71.0 | 66.1 | 86.3 | 43.2 |
| Basal LH/FSH ratio ≥0.042 | 70.4 | 77.4 | 90.3 | 46.6 |
| Uterine length ≥2.2 cm | 83.3 | 33.9 | 79.1 | 40.4 |
| Uterine transverse diameter ≥0.76 cm | 71.0 | 56.5 | 83.0 | 39.3 |
| Fundus ≥0.88 cm | 73.1 | 61.3 | 85.0 | 43.2 |
| Uterine volume ≥1.07 cm3 | 59.1 | 71.0 | 85.9 | 36.7 |
| Uterine cross-sectional area ≥1.76 cm2 | 50.0 | 77.4 | 86.9 | 34.0 |
LH, luteinizing hormone; FSH, follicle-stimulating hormone.