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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Demography. 2014 Feb;51(1):141–172. doi: 10.1007/s13524-013-0242-0

Table 1.

Sample characteristics: ROOM, Add Health Wave I genetic sample, and Add Health Wave I full sample

ROOM Add Health Wave I
Genetic Sample
Add Health Wave I
Full Sample

Sample Freshmen, Sophomores,
and Juniors in a Large
Public University
U.S. Representative
Sample Aged 12–18
U.S. Representative
Sample Aged 12–18
Time of Survey Spring 2008 1994–1995 1994–1995
Age of Respondents 18–20 12–18 12–18
Male (%) 39.81 47.32 45.18
Southern States (%) 89.01 36.09 37.11
Race/Ethnicity (%)
 White 65.19 56.31 50.39
 Black 13.39 17.35 20.88
 East Asian 4.18 6.67 6.03
 South Asian 2.00 0.11 0.32
 Hispanic 7.40 15.42 17.05
 American Indian o.19 0.18 0.55
 Other 1.02 0.78 0.91
 Multiracial 6.62 3.18 3.86
Mother’s Education (%)
 Less than high school 1.51 16.94 18.16
 High school graduate or GED 7.58 39.57 39.12
 College 53.23 35.66 33.79
 More than college 37.68 7.83 8.92
European Ancestry (%) 77.03 70.67 – –
African Ancestry (%) 15.79 18.70 – –
Asian Ancestry (%) 7.18 10.63 – –
Sample Size 2,065 2,281 20,745