Table 3.

The association between relationship type, pregnancy outcomes, and maternal health behaviors

	Married		Cohabitating				Unmarried, Non-cohabitating
	N = 78		N = 269				N = 366
			Crude		Adjusted		Crude		Adjusted
Pregnancy outcome/health behavior	PRa	95% CIb	PR	95% CI	PR	95% CI	PR	95% CI	PR	95% CI
Pretermc	Referent	--	0.85	0.49, 1.47	0.80	0.44, 1.48	0.97	0.58, 1.65	0.95	0.53, 1.69
Low birth weightd	Referent	--	1.47	0.68, 3.17	1.91	0.77, 4.73	1.32	0.62, 2.81	1.79	0.72, 4.48
Adequate prenatal caree	Referent	--	0.82	0.58, 1.15	0.82	0.58, 1.15	0.72	0.52, 1.01	0.72	0.52, 1.01
Prenatal smokingf	Referent	--	1.49	0.82, 2.70	1.81	0.99, 3.34	1.42	0.79, 2.55	1.27	0.71, 2.30
Prenatal drug useg	Referent	--	1.16	0.53, 2.55	0.78	0.34, 1.79	1.92	0.91, 4.03	1.17	0.53, 2.59

^aPR = prevalence ratio.

^bCI = confidence interval.

^cAdjusted prevalence ratio controls for maternal age, Medicaid, welfare, and smoking.

^dAdjusted prevalence ratio controls for the Family Resource Scale, Medicaid, welfare, smoking, and physical abuse, emotional abuse, and control/dominance.

^eAdjusted estimates are the same as the unadjusted as there were no significant confounders.

^fadjusted estimates control for maternal age, maternal education, drug use, welfare, and the family resource scale.

^gAdjusted estimates control for maternal age, maternal education, the family resource scale, Medicaid, welfare, and smoking.