Table 2.

Distribution of maternal and infant characteristics by relationship type

	Married		Unmarried, cohabitating		Unmarried, non-cohabitating		p-value
	N = 78		N = 269		N = 366
	Mean	+/−	Mean	+/−	Mean	+/−
Maternal age*	28.12	5.12	23.62	5.15	23.51	5.15	<.0001
Family Resources Scale*	44.34	15.17	45.07	13.40	49.29	15.99	0.0006
	n	%	n	%	n	%	p-value
High school education or equivalent*							0.01
Yes	56	71.79	158	58.74	192	52.46
No	22	28.21	111	41.26	174	47.54
Smoking statusa							0.55
Yes	11	14.10	56	20.82	73	19.95
No	67	85.90	211	78.44	292	79.78
Unknown	0	0	2	0.74	1	0.27
Drug use*							0.02
Yes	7	8.97	28	10.41	63	17.21
No	71	91.03	241	89.59	303	82.79
Welfare services*							0.0004
Yes	18	23.08	134	49.81	178	48.63
No	56	71.79	122	45.35	176	48.09
Unknown	4	5.13	13	4.83	12	3.28
Medicaid							0.12
Yes	40	51.28	164	60.97	244	66.67
No	34	43.59	93	34.57	110	30.05
Unknown	4	5.13	12	4.46	12	3.28
Physical abuse							0.48
Yes	0	0	7	2.60	11	3.01
No	74	94.87	248	92.19	342	93.44
Unknown	4	5.13	14	5.20	13	3.55
Emotional abuse							0.24
Yes	8	10.26	44	16.36	59	16.12
No	65	83.33	192	71.38	259	70.77
Unknown	5	6.41	33	12.27	48	13.11
Control/dominance							0.15
Yes	9	11.54	54	20.07	63	17.21
No	64	82.05	182	67.66	255	69.67
Unknown	5	6.41	33	12.22	48	13.11
Adequacy of prenatal care							0.71
Adequate or adequate plus	29	37.18	82	30.48	98	26.78
Intermediate	7	8.97	28	10.41	38	10.38
Inadequate	25	32.05	92	34.20	136	37.16
Unknown	17	21.79	67	24.91	94	25.68
Preterm							0.72
Yes	14	17.95	41	15.24	64	17.49
No	64	82.05	228	84.76	302	82.51
Low birth weight							0.59
Yes	7	8.97	36	13.38	44	12.02
No	69	88.46	230	85.50	319	87.16
Unknown	2	2.56	3	1.12	3	0.82

^abased on self-report of smoking in the 2nd trimester.

*Statistically significant differences between relationship types.