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. Author manuscript; available in PMC: 2010 May 6.
Published in final edited form as: Paediatr Perinat Epidemiol. 2009 Mar;23(2):116–124. doi: 10.1111/j.1365-3016.2008.00992.x

Table 2.

Selected maternal characteristics (%) by availability of census block group data

Complete block group data
Incomplete block group data
Cases (n = 276) Controls (n = 551) Cases (n = 54) Controls (n = 74)
Maternal race/ethnicity
 US-born Hispanic 19.2 22.4 7.4 15.9
 Foreign-born Hispanic 47.0 37.7 59.3 42.0
 White 22.8 21.7 20.4 20.3
 Black 3.6 7.5 3.7 7.3
 Asian 5.0 9.3 7.4 11.6
 Other 2.5 1.5 1.9 2.9
Maternal education
 <High school 39.9 28.8 53.7 30.4
 High school 19.9 24.7 13.0 20.3
 Some college 22.1 21.4 7.4 26.1
 ≥Bachelor’s degree 18.2 25.1 25.9 23.2
Maternal employment
 yes 59.1 61.4 48.2 53.6
Intake of folic acid-containing supplements
 yes 54.8 63.0 50.0 53.4