Table-III.

Frequency of early versus late PTL regarding cervical length.

Variable	B	S.E	Odds Ratio	95%CI	P
Vaginal PH	1.002	0.169	2.73	1.96 - 3.79	<0.001
Cervical Length	-0.116	0.32	0.89	0.84 - 0.95	<0.001
Parity	0.961	0.237	2.61	1.64 - 4.16	<0.001
Age	-0.28	0.039	0.92	0.90 – 1.05	0.475