| Autor: |
Jerrett, Michael1 jerrett@berkeley.edu, Shankardass, Ketan2, Berhane, Kiros2, Gauderman, W. James2, Künzli, Nino3, Avol, Edward2, Gilliland, Frank2, Lurmann, Fred4, Molitor, Jassy N.5, Molitor, John T.5, Thomas, Duncan C.2, Peters, John2, McConnell, Rob2 |
| Předmět: |
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| Zdroj: |
Environmental Health Perspectives. Oct2008, Vol. 116 Issue 10, p1433-1438. 6p. 7 Charts, 1 Map. |
| Abstrakt: |
BACKGROUND: The question of whether air pollution contributes to asthma onset remains unresolved. OBJECTIVES: In this study, we assessed the association between asthma onset in children and traffic-related air pollution. METHODS: We selected a sample of 217 children from participants in the Southern California Children's Health Study, a prospective cohort designed to investigate associations between air pollution and respiratory health in children 10-18 years of age. Individual covariates and new asthma incidence (30 cases) were reported annually through questionnaires during 8 years of follow-up. Children had nitrogen dioxide monitors placed outside their home for 2 weeks in the summer and 2 weeks in the fall--winter season as a marker of traffic-related air pollution. We used multilevel Cox models to test the associations between asthma and air pollution. RESULTS: In models controlling for confounders, incident asthma was positively associated with traffic pollution, with a hazard ratio (HR) of 1.29 [95% confidence interval (CI), 1.07--1.56] across the average within-community interquartile range of 6.2 ppb in annual residential NO2. Using the total interquartile range for all measurements of 28.9 ppb increased the HR to 3.25 (95% CI, 1.35--7.85). CONCLUSIONS: In this cohort, markers of traffic-related air pollution were associated with the onset of asthma. The risks observed suggest that air pollution exposure contributes to new-onset asthma. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
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