Table 4.

Logistic regression analysis

Factor	Β	Standard Error	Chi-square	P-value	OR	95% CI Lower	95% CI Upper
Placental adhesions	1.367	0.53	6.659	0.010	3.924	1.389	11.083
Placenta accreta	1.561	1.116	1.958	0.162	4.764	0.535	42.426
Type of placenta previa	1.522	0.54	7.934	0.005	4.583	1.589	13.22
AFP	-1.57	0.569	7.612	0.006	0.208	0.068	0.635
PLGF	1.377	0.536	6.589	0.010	3.963	1.385	11.34

Note: AFP, Alpha-fetoprotein; PLGF, placental growth factor.