Table 3 ROC analysis for COH variables in the previous IVF and the ZIFT cycles
Variable | Cut off | Sensitivity | Specificity | p-value |
|---|---|---|---|---|
Previous IVF cycle | ||||
Number of cycles | ≤6 | 27.2 | 96.435 | ns |
Patients’ age (years) | ≤31 | 58.3 | 71.4 | ns |
Mean number of daily gonadotropin ampoules used | ≤3.5 | 90.9 | 41.9 | ns |
Peak E2 levels on day of hCG administration (pg/ml) | ≤1656 | 54.5 | 64.5 | ns |
Number of 2PN | >8 | 54.5 | 90.6 | ns |
Total number of top quality | ≤2 | 91.6 | 28.1 | ns |
Embryos (TQE) | ||||
Ratio of number of TQE to 2PN | ≤0.41 | 100.0 | 25.0 | ns |
Number of embryos transferred | >2 | 75.0 | 33.3 | ns |
ZIFT cycle | ||||
Mean number of daily gonadotropin ampoules used | ≤4 | 100 | 28.5 | ns |
Peak E2 levels on day of hCG administration (pg/ml) | ≤2370 | 81.8 | 42.8 | ns |
Number of 2PN | >7 | 63.6 | 74.2 | <0.05 |
Number of 2PN transferred | >4 | 75.0 | 48.5 | ns |