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. Author manuscript; available in PMC: 2013 Sep 1.
Published in final edited form as: Soc Sci Res. 2012 Apr 16;41(5):1152–1165. doi: 10.1016/j.ssresearch.2012.04.002

Table 1.

Weighted Means and Proportions, by Race/Ethnicity

All (N≈8550) SD White (N≈3650) African American (N≈1350) Latino (N≈1700)
Wave 1 cognitive T-score 50.08 (9.89) 50.60 #& 49.30 # 49.57 &
Wave 2 cognitive T-score 50.07 (9.99) 52.58 #& 47.28 # 46.40 &
Wave 1 family structure
Nuclear: Married to bio dad 0.66 0.80 #& 0.28 #$ 0.56 $&
 Single 0.19 0.09 #& 0.58 #$ 0.18 $&
 Cohabiting with bio dad 0.14 0.09 #& 0.13 #$ 0.25 $&
 Nonbio partner 0.01 0.01 # 0.01 # 0.01
Extended: None 0.78 0.87 #& 0.66 # 0.65 &
 Grandparent(s) only 0.10 0.07 #& 0.16 #$ 0.12 $&
 Other adult(s) only 0.07 0.03 #& 0.08 #$ 0.15 $&
 Grandparent(s) and other(s) 0.05 0.03 #& 0.10 # 0.08 &
Wave 1–2 transitions
Partner: Neither wave 0.15 0.07 #& 0.51 #$ 0.14 $&
 Gain partner 0.04 0.03 # 0.07 #$ 0.04 $
 Lose partner 0.05 0.04 # 0.06 # 0.06
 Keep partner 0.76 0.86 #& 0.36 #$ 0.76 $&
Grandparents: Neither wave 0.82 0.88 #& 0.70 #$ 0.76 $&
 Gain grandparents 0.03 0.03 & 0.04 0.04 &
 Lose grandparents 0.05 0.04 # 0.07 # 0.05
 Keep grandparents 0.10 0.06 #& 0.19 #$ 0.15 $&
Other adults: Neither wave 0.84 0.92 #& 0.77 #$ 0.71 $&
 Gain other adults 0.04 0.03 #& 0.06 # 0.06 &
 Lose other adults 0.05 0.03 #& 0.06 #$ 0.09 $&
 Keep other adults 0.07 0.03 #& 0.11 # 0.14 &
Wave 2 assessment age 24.38 (1.16) 24.35 24.39 24.44
# others in household under 18 1.12 (1.18) 1.00 #& 1.40 #$ 1.24 $&
Female child 0.49 0.49 0.48 0.49
Mom repeated a grade 0.15 0.12 #& 0.21 # 0.21 &
Mom live with parents until 16 0.59 0.64 #& 0.36 #$ 0.59 $&
Mom on welfare age 5 to 16 0.11 0.08 #& 0.24 #$ 0.10 $&
Foreign-born mother 0.21 0.05 #& 0.11 #$ 0.57 $&
English is primary language 0.81 0.97 #& 0.96 #$ 0.42 $&
Teenage mother at birth 0.11 0.07 #& 0.20 #$ 0.14 $&
Mom’s Wave 1 education (yrs) 12.78 (2.99) 13.76 #& 12.17 #$ 10.86 $&
Wave 1 household income
 Under 100% of poverty line 0.23 0.12 #& 0.46 #$ 0.35 $&
 100–199% 0.29 0.23 #& 0.29 #$ 0.38 $&
 200–299% 0.12 0.14 #& 0.09 # 0.11 &
 300–399% 0.12 0.16 #& 0.07 # 0.06 &
 400% or greater 0.24 0.35 #& 0.08 # 0.09 &
Number of moves since wave 1 0.42 (0.69) 0.40 #& 0.50 # 0.45 &
Change in % of poverty line 0.05 (1.32) 0.06 0.03 0.06

Source: Early Childhood Longitudinal Study-Birth Cohort, 2001.

Notes: SD = standard deviation

#

White/African American difference significant at p<.05

&

White/Latino difference significant at p<.05

$

African American/Latino difference significant at p<.05