Estimating risk of emergency room visits for asthma from personal versus fixed site measurements of NO2 (6 page pdf, Scott Weichenthal, Patrick Bélisle, Eric Lavigne, Paul J. Villeneuve, Amanda Wheeler, Xiaohong Xu, Lawrence Joseph, Environmental Research, Feb. 2015)
Today we review research from Windsor, Ontario which compared the exposure to NO2 from an Ogawa personal exposure meter to daily exposure estimated from a fixed nearby measurement site, part of the National Air Pollution Surveillance (NAPS) network and in reference to emergency asthmatic cases. Results indicated that next to zero correlation between the two values from a sample of almost 1,000 measurements. The authors concluded that more attention must be paid to how exposure to pollution is estimated for risk estimates in epidemiological studies. This has significant implications for urban air quality network design as well.
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