Table 3.

Multivariate analysis of factors influencing prematurity

Variables	Beta	S.E.	Wald	Df	Significant level	Odds Ratio	95% C.I. for Odds Ratio
							Lower	Upper
Amniotic Fluid	1.476	0.376	15.430	1	<0.001†	4.376	2.095	9.141
Premature rupture of membranes	0.973	0.309	9.924	1	0.002†	2.646	1.444	4.846
Twin	2.891	0.645	20.112	1	<0.001†	18.004	5.090	63.684
Hypertension	0.902	0.342	6.944	1	0.008†	2.466	1.260	4.825
Family history of preterm labor	1.250	0.617	4.101	1	0.043†	3.490	1.041	11.700

† Statistically Significant.

Mother’s own Prematurity, Previous delivery, Vaginal damages, Neonatal death, Previous preterm labor, Overt Diabetes mellitus and Age group were removed from the model.