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. Author manuscript; available in PMC: 2014 Apr 8.

Published in final edited form as: Clin Exp Allergy. 2008 Sep 24;38(11):1738–1744. doi: 10.1111/j.1365-2222.2008.03095.x

Table 1.

Characteristics of case–control populations

	African-American		Non-Hispanic white		Hispanic
	Cases (n = 168)	Controls (n = 269)	Cases (n = 233)	Controls (n = 245)	Cases (n = 116)	Controls (n = 130)
Age, mean±SD	22.3±12.7	32.5±11.3	23.9±13.1	32.7±11.0	17.4±11.7	36.8±12.3
% Male	45.8	44.6	39.5	39.8	46.5	32.3
IgE, IU/mL (geo. mean)	204.2±4.1	66.1±4.4	138.0±4.6	15.5±6.8	223.9±4.7	32.4±4.9
FEV₁, % predicted (SD)^*	75.5 (20.6)	ND	82.6 (16.4)	ND	95.2 (15.9)	ND
Mean FEV₁/FVC	0.7±0.1	ND	0.8±0.1	ND	0.8±0.1	ND
Mean PC₂₀, mg/mL	3.5±5.1	ND	3.6±5.8	ND	3.9±5.9	ND

^*

Percent predicted FEV₁ values for African-Americans are race-adjusted [14].

ND, not determined.