Joachim Heinrich1, Feng Guo, Mary Jo Trepka. 1. From the aInstitute of Epidemiology I, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany; bInstitute and Outpatient Clinic for Occupational, Social and Environmental Medicine, University Hospital Munich, Ludwig Maximilians University Munich, Munich, Germany; cGerman Center for Lung Research (DZL), Munich, Germany; and dDepartment of Epidemiology, Robert Stempel College of Public Health and Social Work, Florida International University, Miami, FL.
Abstract
BACKGROUND: Although mercury exposure has been associated with several adverse health effects, the association with childhood asthma is under investigated. Therefore, we explore the association between mercury and childhood asthma in a population with low mercury levels. METHODS: Mercury levels were measured in blood and urine in 1,056 children ages 5-14 years. In addition to including questions about asthma diagnosis and wheezing, the study measured bronchial hyperresponsiveness and allergic sensitization to common aeroallergens. Logistic regression analysis adjusted for major potential confounders. RESULTS: Overall the adjusted odds ratios (aOR) between log blood mercury and the outcomes were 0.8 (95% CI: 0.63, 1.11) for asthma, 0.9 (95% CI: 0.79, 1.14) for wheeze, 1.1 (95% CI: 0.60, 2.03) for bronchial hyperresponsiveness, and 1.0 (95% CI: 0.80, 1.17) for allergic sensitization. Urine mercury adjusted for creatinine was also not associated with any of these allergy-related outcomes. CONCLUSIONS: While the results did not support an association between mercury exposure and asthma, studies are needed to assess prenatal and lifetime exposure to mercury and asthma.
BACKGROUND: Although mercury exposure has been associated with several adverse health effects, the association with childhood asthma is under investigated. Therefore, we explore the association between mercury and childhood asthma in a population with low mercury levels. METHODS:Mercury levels were measured in blood and urine in 1,056 children ages 5-14 years. In addition to including questions about asthma diagnosis and wheezing, the study measured bronchial hyperresponsiveness and allergic sensitization to common aeroallergens. Logistic regression analysis adjusted for major potential confounders. RESULTS: Overall the adjusted odds ratios (aOR) between log blood mercury and the outcomes were 0.8 (95% CI: 0.63, 1.11) for asthma, 0.9 (95% CI: 0.79, 1.14) for wheeze, 1.1 (95% CI: 0.60, 2.03) for bronchial hyperresponsiveness, and 1.0 (95% CI: 0.80, 1.17) for allergic sensitization. Urine mercury adjusted for creatinine was also not associated with any of these allergy-related outcomes. CONCLUSIONS: While the results did not support an association between mercury exposure and asthma, studies are needed to assess prenatal and lifetime exposure to mercury and asthma.
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