Table 4.
Number of patients | Univariate analysis | P | Multivariate analysis | P | |
---|---|---|---|---|---|
Hazard ratio | Hazard ratio | ||||
(95% CI) | (95% CI) | ||||
Total | 103 | ||||
| |||||
Age < 35 years | 65 | 1.00 | 1.00 | ||
Age ≥ 35 years | 38 | 3.33 (1.22–9.11) | 0.019 | 3.57 (1.24–10.43) | 0.019 |
| |||||
Duration of infertility | |||||
<5 year | 70 | 1.00 | |||
≥5 years | 33 | 3.31 (1.14–9.63) | 0.028 | ||
| |||||
Preexisting recognition of risks of multiple pregnancy | |||||
No | 35 | 1.00 | 0.001 | 1.00 | |
Yes | 66 | 4.32 (1.76–10.60) | 4.59 (1.79–11.72) | 0.001 |