Ultrafine particles in urban air and respiratory health among adult asthmatics
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- 1 March 2001
- journal article
- Published by European Respiratory Society (ERS) in European Respiratory Journal
- Vol. 17 (3) , 428-435
- https://doi.org/10.1183/09031936.01.17304280
Abstract
Airborne particles are associated with adverse health effects and contribute to excess mortality in epidemiological studies. A recent hypothesis proposes that the high numbers of ultrafine (10(particle mass 2.5–10, PM2.5, PM1), was negatively associated with daily PEF deviations. The strongest effects were seen for particles in the ultrafine range. However, the effect of ultrafine particles could not definitely be separated from other traffic generated pollutants, namely nitric oxide, nitrogen dioxide and carbon monoxide. No associations were observed with respiratory symptoms or medication use.Particle mass measurements can be strongly influenced by mechanically produced, soil-derived particles, which may not be associated with adverse health effects. Therefore, air quality monitoring should include particle number concentrations, which mainly reflect ultrafine particles.Keywords
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