Table 3.
RR (95% CI) | p-Value | |
---|---|---|
Age ≥ 36 years | 5.47 (2.42–12.38) | <0.01 |
Lower education background | 1.50 (0.85–2.63) | 0.16 |
>2 times of spontaneous miscarriages | 2.94 (1.66–5.22) | <0.01 |
No history of live birth | 3.77 (1.81–7.82) | <0.01 |
RR: relative risk; CI: confidential intervals. p-values were calculated by multivariable regression analysis, and p < 0.05 was regarded as a statistical difference.