Table 9.

Relative risk of mother's cohabitation and mother's marriage for children by mother's characteristics. U.S. Children ages 0−12, period Cox model estimates and period life-table estimates of proportions, from 1990−94 and 1997−2001^a

	Cohabitation				Marriage
	Hazard Ratio	Parameter Estimateb	Standard Errorb	Percentage cohabited 1997−2001c	Hazard Ratio	Parameter Estimateb	Standard Errorb	Percentage married 1997−2001c
Period
1990−1994	1.00	---	---	---	1.00	---	---	---
1997−2001	1.34	0.29	0.15	25	0.97	−0.03	0.09	55
Mother's union status at birth
Single	1.00	---	---	63	1.00	---	---	45
Cohabiting	---	---	---	---	1.90	0.64	0.08	66
Married	0.21	−1.54	0.13	15	---	---	---	---
Mother's education
< High school	1.00	---	---	31	1.00	---	---	40
HS/GED	1.14	0.13	0.14	40	1.38	0.32	0.12	59
Some College	0.79	−0.23	0.18	20	1.65	0.50	0.13	60
Col 4-yr grad	0.40	−0.91	0.33	6	2.34	0.85	0.22	74
Race/ethnicity
Non-Hispanic
White	1.00	---	---	21	1.00	---	---	67
Black	0.68	−0.38	0.12	45	0.44	−0.82	0.11	39
Hispanic	0.70	−0.36	0.16	27	0.66	−0.42	0.12	51
Mother's age at birth
< 20 years	1.00	---	---	67	1.00	---	---	56
20−24	0.68	−0.39	0.10	37	0.88	−0.13	0.08	57
25−29	0.35	−1.05	0.13	15	0.74	−0.31	0.11	51
30+	0.32	−1.13	0.47	21	0.66	−0.42	0.17	53

^a1990−94 estimates are from the 1995 NSFG, 1997−2001 estimates are from the 2002 NSFG.

^bAll estimates are weighted; standard errors are robust (sandwich) estimates that adjust for the clustering of children in families. Models also control for a residual race/ethnicity category, which is not reported in the table.

^cThese unadjusted life table estimates do not control for any other variables in the table.