Severe and Moderate Asthma Exacerbations in Asthmatic Children and Exposure to Ambient Air Pollutants.

ABSTRACT: It is well established that short-term exposure to ambient air pollutants can exacerbate asthma, the role of early life or long-term exposure is less clear. We assessed the association between severe asthma exacerbations with both birth and annual exposure to outdoor air pollutants with a population-based cohort of asthmatic children in the province of Quebec (Canada). Exacerbations of asthma occurring between 1 April 1996 and 31 March 2011 were defined as one hospitalization or emergency room visit with a diagnosis of asthma for children (<13 years old) already diagnosed with asthma. Annual daily average concentrations of ozone (O₃) and nitrogen dioxide (NO₂) were estimated at the child's residential postal code. Satellite based levels of fine particulate (PM2.5) estimated for a grid of 1

SUBMITTER: Tetreault LF 

PROVIDER: S-EPMC4997457 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature