Abstract
Air pollutants from wildfires and obesity independently exacerbate asthma, yet no study has determined the combined effects of these 2 variables on asthma outcomes. To determine the effect of 2 catastrophic wildfires affecting the Southern California region (in 2003 and 2007) on several asthma outcomes in a cohort of children. To investigate the association between wildfire exposure and asthma outcomes, we stratified our study population by body mass index categories (underweight, normal, overweight, and obese) and zip codes (to distinguish individuals who were closer to the fires vs farther away). The primary outcome was the prevalence of physician-dispensed short-acting β-agonist (SABAs). Secondary outcomes included the rate of emergency department visits and/or hospitalizations for asthma, the frequency of oral corticosteroid use for asthma, and number of new diagnoses of asthma. A total of 2,195 and 3,965 asthmatic children were analyzed as part of our retrospective cohort during the 2003 and 2007 wildfires, respectively. SABA dispensing increased the most in the obese group after the 2003 wildfires (P < .05). Increased prevalence of SABA dispensing was also noted in the obese group in 2007, but this was not statistically h...Continue Reading
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