Journal
ENVIRONMENTAL POLLUTION
Volume 204, Issue -, Pages 9-16Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2015.04.010
Keywords
Asthma; Hospitalisation; Aeroallergens; Allergy; Air pollution; Epidemiology; SSC
Categories
Funding
- Clean Air Regulatory Agenda of the Government of Canada
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Pollution levels and the effect of air pollution on human health can be modified by synoptic weather type and aeroallergens. We investigated the effect modification of aeroallergens on the association between CO, O-3, NO2, SO2, PM10, PM2.5 and asthma hospitalisation rates in seven synoptic weather types. We developed single air pollutant models, adjusted for the effect of aeroallergens and stratified by synoptic weather type, and pooled relative risk estimates for asthma hospitalisation in ten Canadian cities. Aeroallergens significantly modified the relative risk in 19 pollutant-weather type combinations, reducing the size and variance for each single pollutant model. However, aeroallergens did not significantly modify relative risk for any pollutant in the DT or MT weather types, or for PM10 in any weather type. Thus, there is a modifying effect of aeroallergens on the association between CO, O-3, NO2, SO2, PM2.5 and asthma hospitalisations that differs under specific synoptic weather types. Crown Copyright (C) 2015 Published by Elsevier Ltd.
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