Table 2.

Results of the multivariate logistic regression of the candidate factor

Factor	Adjusted OR (95% CI)	p value
Maternal age	1.24 (1.18–1.29)	< 0.001
Multipara	0.21 (0.13–0.33)	< 0.001
Velamentous insertion of cord	1.72 (1.08–2.72)	0.026