Table 3.
Multivariate regression analysis of the factors associated with live birth
| aOR (95%CI) | P | |
|---|---|---|
| Age (years) | 0.919 (0.895, 0.944) per every 1-year increase | < 0.0001 |
| BMI (kg/m2) | ||
| < 18 | 1.448 (0.837, 2.503) | 0.185 |
| 18 ≤ ~ < 24 | reference | |
| 24 ≤ ~ < 28 | 0.611 (0.364, 1.03) | 0.062 |
| ≥ 28 | 0.504 (0.31, 0.505) | 0.006 |
| Infertility duration (years) (< 1 vs ≥ 1) | 1.02 (0.984, 1.058) | 0.284 |
| Infertility type (primary vs secondary) | 1.039 (0.83, 1.3) | 0.74 |
| Infertility cause | ||
| Tubal | reference | |
| Decreased ovarian deserve | 0.791 (0.593, 1.057) | 0.113 |
| Endometriosis | 0.624 (0.304, 1.279) | 0.198 |
| Male factors | 0.956 (0.678, 1.348) | 0.799 |
| Others | 1.120 (0.762, 1.646) | 0.564 |
| Endometrium thickness (mm) | 1.054 (1.001, 1.109) per every 1-mm increase | 0.045 |
| Embryo transfer number (2 vs 1) | 2.454 (1.846, 3.261) | 0 |
| Embryo stage (blastocyst vs cleavage) | 1.362 (0.997, 1.898) | 0.082 |
| Embryo quality (good vs poor) | 1.035(1.012, 1.081) | 0.038 |
| cryopreservation time | 0.999 (0.997, 1.000) per every 1-year increase | 0.126 |
| LH surge (yes vs no) | 0.947 (0.769, 1.166) | 0.607 |