Table III.

Results of regression analyses of African ancestry proportions and asthma and tIgE levels for Barbadians, Jamaicans, Brazilians, Colombians and two African American samples

Population	Asthma (OR, 95% CI, P value)*	Total serum IgE levels (β, 95% CI, P value)**
Barbadians	1.1 (0.16–6.9;0.9)	3.8 (1.1–13.1;0.03)
Jamaicans	0.8 (0.22–3.1;0.8)	1.0 (0.7–1.4;0.9)
Brazilians	136.5 (5.4–3406;0.003)	1.6 (1.1–2.6;0.03)
Colombians	4.5 (1.79–11.27;0.001)	1.3 (1.01–1.7;0.04)
African Americans (New York)	4.7(1.07–21.04;0.04)	NA#
African Americans (Baltimore-Washington, D.C.)	1.1 (0.50–2.81;0.7)	0.99 (0.6–1.7;0.9)

^*Adjusted by age and sex

^**Adjusted by age, sex and asthma status.

^#NA = Not available. The odds ratio (OR) for asthma is associated with a unit increase in African admixture proportion (from 0 to 1).