Table 1.

Descriptive characteristics of analysis sample by parity status, before and after matching by propensity scores, National Longitudinal Study of Adolescent Health, 1994–2008

	Unmatched		Matched 1:1 with replacement
	Parous	Nulliparous	Parous	Nulliparous
N	569	2162	568	568
Age, wave 4 (mean, years)	28.4	27.9	28.4	28.4
US-born	94.6%	93.6%	94.5%	95.8%
Foreign-born (ref)	5.4%	6.4%	5.5%	4.2%
REGION (wave I)
West	22.5%	25.2%	22.5%	21.0%
Midwest	27.8%	29.7%	27.8%	29.8%
Northeast	7.9%	11.1%	7.9%	8.8%
South (ref)	41.8%	34.0%	41.7%	40.5%
Urbanicity (wave 1)
Rural	24.8%	16.6%	24.6%	26.2%
Suburban	49.9%	53.3%	50.0%	47.7%
Urban (ref)	25.3%	30.1%	25.4%	26.1%
Highest parental education, wave 1 & wave 2
No high school degree	17.6%	7.6%	17.4%	19.0%
High school graduate/GED	37.1%	25.7%	37.1%	37.1%
Some college	14.1%	13.0%	14.1%	12.1%
Vocational schooling	8.6%	8.4%	8.6%	8.1%
College graduate (ref)	17.7%	27.2%	17.8%	19.0%
Graduate/Prof school	4.9%	18.1%	4.9%	4.6%
Race (Black/White)
White (ref)	63.8%	70.3%	63.9%	62.7%
Black	26.5%	19.7%	26.4%	28.5%
Other	9.7%	10.0%	9.7%	8.8%
Hispanic ethnicities
Mexican	11.8%	6.3%	11.8%	13.2%
Cuban	1.1%	2.4%	1.1%	0.9%
Puerto-Rican	2.1%	1.5%	2.1%	1.4%
Central/South American	1.4%	1.6%	1.4%	1.1%
Other Hispanic	1.9%	0.9%	1.9%	0.7%
Mixed Hispanic ethnicities	0.7%	0.6%	0.7%	0.4%
Not Hispanic (ref)	81.0%	86.8%	81.0%	82.4%
Asian ethnicities
Chinese	0.4%	2.3%	0.4%	0.4%
Filipino	2.3%	3.3%	2.3%	1.6%
Japanese	0.2%	0.3%	0.2%	0.2%
Asian-Indian	0.2%	0.2%	0.2%	0.2%
Korean	0.0%	0.0%	0.0%	0.0%
Vietnamese	0.2%	0.2%	0.2%	0.2%
Other	1.2%	0.8%	1.2%	1.8%
Mixed Asian ethnicities	0.2%	0.7%	0.2%	0.2%
Not Asian (ref)	95.4%	92.2%	95.4%	95.6%