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. 2015 Sep 24;15:75. doi: 10.1186/s12874-015-0067-1

Table 2.

Age and race/ethnicity of women giving birth in the NCS by eligibility status at the time of consent

Status at consent
High non-tryer High tryer Pregnant
% % %
Age, years <18 0 0 1.4
18–19 * 0 3.3
20–34 90.9 83.7 76.5
35+ * 16.3 18.7
Mean (standard deviation) 27.7 (4.0) 30.7 (4.1) 29.2 (5.7)
Race/ethnicity Asian, non-Hispanic * * 4.2
Black, non-Hispanic * * 6.4
Hispanic 22.7 10.2 20.0
Other^ 20.5 20.4 8.0
White, non-Hispanic 50.0 67.3 61.5

*Cell counts are too small to display. (Despite age eligibility criteria for high non-tryers, the cell counts for age 35+ are not zero)

^includes women who report two or more races. For age categories, P < 0.05; For race and ethnicity, P < 0.01