Table 5.
Accuracy of LH and androstendione cut-off points to predict spontaneous ovulation and life birth
| Spontaneous ovulation (n = 100) | Life birth (n = 71) | |||||
|---|---|---|---|---|---|---|
| LH >12.1 IU/l | Androstenedione >3.26 mg/dl | LH >12.1 IU/l and androstenedione >3.26 mg/dl | LH >12.1 IU/l | Androstenedione >3.26 | LH >12.1 IU/l and androstenedione >3.26 mg/dl | |
| Sensitivity (%) | 88.7 (95% CI 79.0-95.0)a | 50.7 (95% CI 38.6-62.8)a | 43.7 (95% CI: 31.4-55.3)a | 88.9 (95% CI: 73.9-96.9) | 44.4 (95% CI: 27.9-61.9) | 36.1 (95% CI: 20.2-52.5) |
| Specifity (%) | 75.9 (95% CI 56.5-89.7)a | 79.3 (95% CI 60.3-92.0)a | 100.0 (95% CI: 85.0-100.0)a | 54.3 (95% CI: 36.6-71.2) | 42.9 (95% CI: 26.3-60.6) | 100.0 (95% CI: 87.4-100.0) |
| Positive predictive value (%) |
90.0 (95% CI 80.5-95.8)a | 85.7 (95% CI 71.5-94.6)a | 100.0 (95% CI: 85.9-100.0)a | 66.7 (96% CI: 51.6-79.6) | 44.4 (95% CI: 27.9-61.9) | 100.0 (95% CI: 69.8-100.0) |
| Negative predictive value (%) |
73.3 (95% CI 54.1-87.7)a | 39.7 (95% CI 27.0-53.4)a | 42.0 (95% CI: 29.8-53.8)a | 82.6 (95% CI: 61.2-95.0) | 42.9 (95% CI: 26.3-60.6) | 60.3 (95% CI: 45.8-71.9) |
aCI = confidence interval