Abstract
Background: Associations between long-term exposure to ambient particulate matter (PM) and cardiovascular (CVD) mortality have been widely recognized. However, health effects of long-term exposure to constituents of PM on total CVD mortality have been explored in a single study only.
Aims: The aim of this study was to examine the association of PM composition with cardiovascular mortality.
Methods: We used data from 19 European ongoing cohorts within the framework of the ESCAPE (European Study of Cohorts for Air Pollution Effects) and TRANSPHORM (Transport related Air Pollution and Health impacts Integrated Methodologies for Assessing Particulate Matter) projects. Residential annual average exposure to elemental constituents within particle matter smaller than 2.5 and 10 pm (PM2.5 and PM10) was estimated using Land Use Regression models. Eight elements representing major sources were selected a priori (copper, iron, potassium, nickel, sulfur, silicon, vanadium and zinc). Cohort-specific analyses were conducted using Cox proportional hazards models with a standardized protocol. Random-effects metaanalysis was used to calculate combined effect estimates.
Results: The total population consisted of 322,291 participants, with 9545 CVD deaths. We found no statistically significant associations between any of the elemental constituents in PM2.5 or PM10 and CVD mortality in the pooled analysis. Most of the hazard ratios (HRs) were close to unity, e.g. for PM10 Fe the combined HR was 0.96 (0.84-1.09). Elevated combined HRs were found for PM2.5 Si (1.17, 95% Cl: 0.93-1.47), and S in PM2.5 (1.08,95% Cl: 0.95-1.22) and PM10 (1.09,95% Cl: 0.90-132).
Conclusion: In a joint analysis of 19 European cohorts, we found no statistically significant association between long-term exposure to 8 elemental constituents of particles and total cardiovascular mortality. (C) 2014 Elsevier Ltd. All rights reserved.
Original language | English |
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Pages (from-to) | 97-106 |
Number of pages | 10 |
Journal | Environment international |
Volume | 66 |
DOIs | |
Publication status | Published - May 2014 |
Funding
~ The research leading to these results has received funding from the European Community's Seventh Framework Program (FP7/2007-2011): ESCAPE 3 (grant agreement number: 211250) and TRANSPHORM (ENV.2009.12.2.1). SAPALDIA received support in mortality record linkage from the Swiss National Cohort Study, grant numbers: Periode 1.7.2006-30.6.2011:108806, Periode 1.7.2011-30.6.2014: 134273. The KORA research platform and the MONICA Augsburg studies were initiated and financed by the Helmholtz Zentrum Munchen, German Research Center for Environmental Health, which is funded by the German Federal Ministry of Education and Research and by the State of Bavaria. We thank Marjan Tewis, Marieke Oldenwening, Marta Cirach, Audrey de Nazelle, Marianne Rutschi, Gregor Fessler, Alwin Muxel, Bernhard Anwander, Paolo Crosignani, Jon Wickmann, Daniela Raffaele, Marco Gilardetti, Thomas Kuhlbusch, Ulrich Quass,
Keywords
- Long-term exposure
- Particulate matter
- Constituents
- Cardiovascular mortality
- ESCAPE
- TRANSPHORM
- USE REGRESSION-MODELS
- EXTENDED FOLLOW-UP
- HARVARD 6 CITIES
- AIR-POLLUTION
- CHEMICAL-COMPOSITION
- TIME-SERIES
- MOUSE LUNG
- NO2
- DISEASE
- PARTICLES