Workgroup Report: Workshop on Source Apportionment of Particulate Matter Health Effects—Intercomparison of Results and Implications

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Workgroup Report: Workshop on Source Apportionment of Particulate Matter Health Effects—Intercomparison of Results and Implications

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dc.contributor.author Thurston, George D.
dc.contributor.author Ito, Kazuhiko
dc.contributor.author Mar, Therese
dc.contributor.author Christensen, William F.
dc.contributor.author Eatough, Delbert J.
dc.contributor.author Henry, Ronald C.
dc.contributor.author Lall, Ramona
dc.contributor.author Larson, Timothy V.
dc.contributor.author Neas, Lucas
dc.contributor.author Pinto, Joseph
dc.contributor.author Stölzel, Matthias
dc.contributor.author Hopke, Philip K.
dc.contributor.author Kim, Eugene
dc.contributor.author Laden, Francine
dc.contributor.author Liu, Hao
dc.contributor.author Suh MacIntosh, Helen H.
dc.date.accessioned 2011-05-15T19:42:37Z
dc.date.issued 2005
dc.identifier.citation Thurston, George D., Kazuhiko Ito, Therese Mar, William F. Christensen, Delbert J. Eatough, Ronald C. Henry, Eugene Kim, et al. 2005. Workgroup report: Workshop on source apportionment of particulate matter health Effects - A intercomparison of results and implications. Environmental Health Perspectives 113(12): 1768-1774. en_US
dc.identifier.issn 0091-6765 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:4889496
dc.description.abstract Although the association between exposure to ambient fine particulate matter with aerodynamic diameter < 2.5 μm (PM\(_{2.5}\)) and human mortality is well established, the most responsible particle types/sources are not yet certain. In May 2003, the U.S. Environmental Protection Agency’s Particulate Matter Centers Program sponsored the Workshop on the Source Apportionment of PM Health Effects. The goal was to evaluate the consistency of the various source apportionment methods in assessing source contributions to daily PM\(_{2.5}\) mass–mortality associations. Seven research institutions, using varying methods, participated in the estimation of source apportionments of PM\(_{2.5}\) mass samples collected in Washington, DC, and Phoenix, Arizona, USA. Apportionments were evaluated for their respective associations with mortality using Poisson regressions, allowing a comparative assessment of the extent to which variations in the apportionments contributed to variability in the source-specific mortality results. The various research groups generally identified the same major source types, each with similar elemental makeups. Intergroup correlation analyses indicated that soil-, sulfate-, residual oil-, and salt-associated mass were most unambiguously identified by various methods, whereas vegetative burning and traffic were less consistent. Aggregate source-specific mortality relative risk (RR) estimate confidence intervals overlapped each other, but the sulfate-related PM\(_{2.5}\) component was most consistently significant across analyses in these cities. Analyses indicated that source types were a significant predictor of RR, whereas apportionment group differences were not. Variations in the source apportionments added only some 15% to the mortality regression uncertainties. These results provide supportive evidence that existing PM\(_{2.5}\) source apportionment methods can be used to derive reliable insights into the source components that contribute to PM\(_{2.5}\) health effects. en_US
dc.language.iso en_US en_US
dc.publisher National Institute of Environmental Health Sciences en_US
dc.relation.isversionof doi:10.1289/ehp.7989 en_US
dc.relation.hasversion http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1314918/pdf/ en_US
dash.license LAA
dc.title Workgroup Report: Workshop on Source Apportionment of Particulate Matter Health Effects—Intercomparison of Results and Implications en_US
dc.type Journal Article en_US
dc.description.version Version of Record en_US
dc.relation.journal Environmental Health Perspectives en_US
dash.depositing.author Laden, Francine
dc.date.available 2011-05-15T19:42:37Z
dash.affiliation.other HMS^Medicine-Brigham and Women's Hospital en_US
dash.affiliation.other SPH^Exposure Epidemiology and Risk Program en_US

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