Abstract
Daily to monthly variations in fine particulate matter have been linked to systemic inflammatory responses. It has been hypothesized that smaller particles resulting from combustion processes confer higher toxicity. We aim to analyze the association between short-term exposure to ultrafine and fine particles and systemic inflammation. We use baseline data (2000–2003) of the Heinz Nixdorf Recall Study, a population-based cohort study of 4,814 participants in the Ruhr Area in Germany. A chemistry transport model was applied to model daily surface concentrations of particulate air pollutants on a grid of 1 km2. Exposure included particle number (PN) and particulate matter mass concentration with an aerodynamic diameter ≤2.5 μm (PM2.5) and ≤10 μm (PM10). Generalized additive models were used to explore the relation of air pollutants using single day lags and averaging times of up to 28 days with high-sensitivity C-reactive protein (hs-CRP). We adjusted for meteorology, season, time trend, and personal characteristics. Median hs-CRP level in the 3,999 included participants was 1.5 mg/l. Median daily concentration of PN was 8,414 × 104/ml (IQR 4,580 × 104/ml), of PM2.5 14.5 μg/m³ (IQR 11.5 μg/m³) and of PM10 18.5 μg/m³ (IQR 13.9 μg/m³). A positive association between PN and hs-CRP could be observed only for single day lags and for averaged PN concentrations with higher estimates for longer averaging times. The highest hs-CRP-increase of 7.1% (95%-CI: 1.9, 12.6%) was found for the 21-day average. These results support the hypothesis that short-term exposure to traffic-related particles might lead to detrimental cardiovascular health effects via an inflammatory mechanism.
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Acknowledgments
We thank the Heinz Nixdorf Foundation (Chairman: Dr. Jur. G. Schmidt) for their generous support of this study. This study is also supported by the German Ministry of Education and Science. We thank K. Lauterbach (Department of Health Economics and Epidemiology, University of Cologne, Germany) for his valuable contribution to the study. We are indebted to the investigative group and the study personnel of the Heinz Nixdorf Recall study, in particular EM Beck, IMIBE, Dr. M. Bröcker-Preuss from the Department of Clinical Chemistry and Laboratory Medicine. Advisory board: T. Meinerz, Hamburg (Chair); M.Blettner, Mainz; C. Bode, Freiburg; P. J. de Feyter, Rotterdam, Zürich, Niederlande; B. Güntert, Hall i.T., Schweiz; F. Gutzwiller, Schweiz; H. Heinen, Bonn; O. Hess, Bern, Schweiz; B. Klein, Essen; H. Löwel, Neuherberg; M.Reiser, München; G. Schmidt, Essen; M. Schwaiger, München; C. Steinmüller, Bonn; T. Theorell, Stockholm, Schweden; S. N. Willich, Berlin. Criteria and end point committee: C. Bode, Freiburg (Chair), K.Berger, Münster; H. R. Figulla, Jena; C. Hamm, Bad Nauheim; P. Hanrath, Aachen; W. Köpcke, Münster; C. Weimar, Essen; A. Zeiher, Frankfurt. We also thank the North Rhine-Westphalia State Agency for Nature, Environment and Consumer Protection for providing emission data for North Rhine-Westphalia. Funded by DFG JO 170/8-1.
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This study is conducted on behalf of the Investigator Group of the Heinz Nixdorf Recall study.
An erratum to this article can be found at http://dx.doi.org/10.1007/s10654-011-9550-0
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Hertel, S., Viehmann, A., Moebus, S. et al. Influence of short-term exposure to ultrafine and fine particles on systemic inflammation. Eur J Epidemiol 25, 581–592 (2010). https://doi.org/10.1007/s10654-010-9477-x
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DOI: https://doi.org/10.1007/s10654-010-9477-x