Skip common site navigation and headers
United States Environmental Protection Agency
Exposure Research
Begin Hierarchical Links EPA Home > Research & Development > Exposure Research > Publications/Presentations > End Hierarchical Links

 

Spatial Association Between Speciated Fine Particles and Mortality

spacer
spacer
Abstract:Particulate matter (PM) has been linked to a range of serious cardiovascular and respiratory health problems. Some of the recent epidemiologic studies suggest that exposures to PM may result in tens of thousands of excess deaths per year and many more cases of illness among the US population. The main objective of our research is to quantify uncertainties about the impacts of fine PM exposure on mortality. We develop a mutivariate spatial regression model for estimation of the risk of mortality associated to fine PM and its components across all counties the conterminous US. Our approach adjust for meteorology and other confounding influences, such as socioeconomic factors, age, gender and ethnicity, characterizes different sources of uncertainty of the data, and models the spatial structure of several components of fine PM. We consider a flexible Bayesian hierarchical model for a space-time series of counts (mortality) by constructing a likelihood based version of a generalized Poisson regression model. The model has the advantage of incorporating both over and under dispersion in addition to correlations that occur in space and time. We apply these methods to monthly mortality county counts and measurements of total and several components of fine PM from: national monitoring networks in the U.S.

Our results seem to suggest an increase by a factor of 2 in the risk of mortality due to fine particles with respect to coarse particles. Our study also shows that in the Western U.S., the nitrate and crustal components of the speciated fine PM seem to have more impact on mortality that the other components. On the other hand, in the Eastern U.S. sulfate and ammonium explain most of the PM fine effect.
spacer
Citation:Fuentes, M., H. Song, S. Ghosh, D. M. Holland, and J. Davis. Spatial Association Between Speciated Fine Particles and Mortality. BIOMETRICS DOI: 10,1111/j.(1541-0420..0052):1-9, (2006).
spacer
spacer
Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
spacer
Division: Environmental Sciences Division
spacer
Branch: Landscape Characterization Branch (RTP)
spacer
Product Type: Journal
spacer
Published: 06/19/2006
spacer
Downloads:
spacer
Bullet Item Spatial Association Between Speciated Fine Particles and Mortality
spacer
spacer
Related Entries:
spacer
Bullet Item Atmospheric Ecosystem Stressor Pattern and Trend Analysis
spacer Relationship Reason:   A Project of the Product
spacer
Bullet Item Environmental Statistics Initiative
spacer Relationship Reason:   A Project of the Product
spacer
spacer
spacer

 

ORD Home | Search EPA | Search NERL | Search EIMS | Contacts | Help

 
Begin Site Footer

EPA Home | Privacy and Security Notice | Contact Us

Last Updated on Monday, October 22, 2007
URL: http://cfpub.epa.gov