Community-level data suggest that asthma prevalence varies between U.S. and foreign-born black subpopulation.

The research found that within one inner-city population, blacks born in the United States were more likely to have asthma than blacks who were born outside of the United States. Of 479 surveys conducted, Brugge and colleagues analysed 290 adult and 157 child responses from individuals who self-identified as black/African-American. Thirty percent of the adults in the study born in the U.S. were diagnosed with asthma while only 11 percent of adults in the study born outside of the U.S. reported asthma. Twenty-three percent (36 subjects) of children in the study born in the U.S. had been diagnosed as having asthma. None of the children born outside of the U.S. (14 subjects) had been diagnosed as having asthma. J Asthma. 2008; 45(9):785-9.