Table 3.
The logistic regression analyses of factors may affect cumulate live birth rate in the female age <35 years group.
| Variable | B | OR | 95% CI | P |
| BMI of female (kg/m2) | –0.017 | 0.983 | 0.972–0.994 | 0.002 |
| Type of infertility | ||||
| Secondary infertility | 0.086 | 1.090 | 1.004–1.183 | 0.040 |
| Classification of infertility | ||||
| Tubal factor | Ref | Ref | – | <0.001 |
| Ovulatory dysfunction | –0.296 | 0.744 | 0.593–0.934 | 0.011 |
| Endometriosis | 0.207 | 1.229 | 0.871–1.734 | 0.239 |
| Confounding factor in female | –0.216 | 0.806 | 0.687–0.945 | 0.008 |
| Other female factor | –0.347 | 0.707 | 0.503–0.993 | 0.045 |
| Cofounding factor in the couple | –0.246 | 0.782 | 0.697–0.877 | <0.001 |
| Male factor only | –0.005 | 0.995 | 0.902–1.097 | 0.918 |
| Unexplained infertility | –0.115 | 0.891 | 0.754–1.053 | 0.176 |
| Duration of stimulation (days) | 0.047 | 1.048 | 1.025–1.072 | <0.001 |
| Number of gonadotropin units used | 0.000 | 1.000 | 1.000–1.000 | <0.001 |
| COH protocol | ||||
| Long protocol | Ref | Ref | – | <0.001 |
| Ultra-long protocol | 0.087 | 1.091 | 0.969–1.228 | 0.149 |
| Short protocol | –0.316 | 0.729 | 0.627–0.848 | <0.001 |
| Antagonist protocol | –0.150 | 0.861 | 0.773–0.958 | 0.006 |
| Number of oocytes retrieved | ||||
| <5 | Ref | Ref | – | <0.001 |
| 5–15 | 0.642 | 1.901 | 1.610–2.244 | <0.001 |
| >15 | 0.316 | 1.372 | 1.140–1.651 | 0.001 |
| Number of transferrable embryo | 0.138 | 1.148 | 1.137–1.160 | <0.001 |
| Constant | –0.212 | 0.809 | – | 0.430 |
BMI: Body mass index; CI: Confidence interval; COH: controlled ovarian hyperstimulation; OR: Odds ratio.