Table 1.

Variable means and standard deviations: pregnancies to females aged 13–25 and 13–35 (unbalanced sample), 1970–2000

	Aged 13–25		Aged 13–35
	All Pregnancies	Miscarriages	All Pregnancies	Miscarriages
Birth	0.720 (0.449)		0.737 (0.440)
Abortion	0.147 (0.354)		0.121 (0.326)
Miscarriage	0.122 (0.328)		0.131 (0.338)
Weeks Pregnant	30.666 (13.491)	9.677 (4.814)	31.17 (13.194)	9.751 (4.738)
White	0.627 (0.484)	0.689 (0.463)	0.664 (0.472)	0.714 (0.452)
African American	0.180 (0.384)	0.152 (0.354)	0.110 (0.359)	0.129 (0.335)
Hispanic	0.155 (0.362)	0.129 (0.335)	0.142 (0.349)	0.121 (0.326)
Protestant	0.565 (0.496)	0.573 (0.495)	0.550 (0.498)	0.558 (0.497)
Catholic	0.327 (0.469)	0.324 (0.468)	0.348 (0.476)	0.342 (0.474)
Education	12.062 (2.476)	12.261 (2.308)	12.603 (2.699)	17.754 (2.580)
Mother’s Education
High school dropout	0.375 (0.484)	0.339 (0.473)	0.352 (0.478)	0.323 (0.468)
High school graduate	0.419 (0.493)	0.436 (0.496)	0.419 (0.493)	0.433 (0.495)
Some college	0.122 (0.327)	0.136 (0.343)	0.132 (0.338)	0.139 (0.346)
College graduate	0.084 (0.278)	0.090 (0.286)	0.097 (0.296)	0.105 (0.307)
Age at Conception	20.884 (2.900)	20.963 (2.928)	24.000 (4.871)	24.547 (5.048)
Conception Before Age 15	0.018 (0.142)	0.020 (0.132)	0.013 (0.113)	0.010 (0.101)
Pregnancy Number	1.982 (1.222)	2.160 (1.383)	2.319 (1.474)	2.590 (1.748)
Prior Miscarriage	0.138 (0.345)	0.241 (0.428)	0.179 (0.383)	0.282 (0.450)
Right Timing of Pregnancy	0.423 (0.494)	0.410 (0.492)	0.481 (0.500)	0.460 (0.498)
N	24,544	2,897	38,122	4,855

Note: Weighted means and standard deviations.

Source: Authors calculations from National Survey of Family Growth data.