Article: National prevalence and exposure risk for cockroach allergen in U.S. households.(Research)

We characterized the prevalence of cockroach allergen exposure in a nationally representative sample of U.S. homes and assessed risk factors for elevated concentrations.

DESIGN: We used data from the National Survey of Lead and Allergens in Housing, a population-based cross-sectional survey.

PARTICIPANTS: Participants were residents of 831 U.S. homes in the survey.

EVALUATIONS/MEASUREMENTS: We analyzed allergen, questionnaire, and observational data of 831 U.S. homes.

RESULTS: Cockroach allergen (Bla g 1) concentrations exceed 2.0 U/g, a level associated with allergic sensitization, in 11% of U.S. living room floors and 13% of kitchen floors. Concentrations ... <$20,000. Odds of having concentrations>

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