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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: J Invest Dermatol. 2013 Jan 18;133(7):1752–1759. doi: 10.1038/jid.2013.19

Table 1.

Subject characteristics*.

Variable No eczema Eczema P-value#
Age (yr) – mean (95% CI) 8.4 (8.3–8.5) 7.5 (7.3–7.7) < 0.0001
Race/ethnicity – no. (%) < 0.0001
 African-American 6495 (13.5) 1618 (22.2)
 Hispanic 8582 (20.4) 1215 (15.6)
 White 46777 (57.1) 6326 (52.5)
 Other/mixed 6186 (9.0) 1079 (9.7)
Female sex – no. (%) 33165 (48.3) 5016 (49.8) 0.25
Household income (Poverty level) – no. (%) 0.76
 0 – 99% 8023 (18.2) 1253 (17.5)
 100 – 199% 11356 (20.4) 1756 (20.4)
 200 – 399% 22966 (30.9) 3478 (32.0)
 ≥400% 26835 (30.5) 3921 (30.1)
#

Rao-Scott chi square test.

*

Missing data were encountered in 79 subjects (0.001%) for the eczema outcome, 0 (0.0%) for age, 4,517 for race/ethnicity (5.7%), 79 for sex (0.001%) and 0 (0.0%) for household income.