Factors affecting the association between ambient concentrations and personal exposures to particles and gases.
Results from air pollution exposure assessment studies suggest that ambient fine particles [particulate matter with aerodynamic diameter </= ; 2.5 microg (PM2.5)], but not ambient gases, are strong proxies of corresponding personal exposures. For particles, the strength of the personal-ambient assoc...
| Publicado en: | Environmental Health Perspectives Vol. 114; no. 5; pp. 649 - 655 |
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| Autores principales: | , , , , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
National Institute of Environmental Health Sciences
May2006
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106174287&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106174287 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00916765 3B5 jtl: Environmental Health Perspectives issn: 00916765 maglogo: N pubinfo: dt: May2006 vid: 114 iid: 5 pid: 56539 pub: National Institute of Environmental Health Sciences place: Research Triangle Park, North Carolina artinfo: ui: 106174287 2009178160 10.1289/ehp.8422 NLM16675415 106174287 ppf: 649 ppct: 6 formats: fmt: @attributes: type: P tig: atl: Factors affecting the association between ambient concentrations and personal exposures to particles and gases. aug: au: Sarnat SE Coull BA Schwartz J Gold DR Suh HH affil: Department of Environmental and Occupational Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA. sug: subj: Air Pollutants Analysis Environmental Exposure Aged Air Pollutants Data Analysis Software Funding Source Particle Size Regression Seasons Human Aged: 65+ years ab: Results from air pollution exposure assessment studies suggest that ambient fine particles [particulate matter with aerodynamic diameter </= ; 2.5 microg (PM2.5)], but not ambient gases, are strong proxies of corresponding personal exposures. For particles, the strength of the personal-ambient association can differ by particle component and level of home ventilation. For gases, however, such as ozone (O3), nitrogen dioxide (NO2), and sulfur dioxide (SO2), the impact of home ventilation on personal-ambient associations is untested. We measured 24-hr personal exposures and corresponding ambient concentrations to PM2.5, sulfate (SO 2 over 4-), elemental carbon, O3, NO2, and SO2 for 10 nonsmoking older adults in Steubenville, Ohio. We found strong associations between ambient particle concentrations and corresponding personal exposures. In contrast, although significant, most associations between ambient gases and their corresponding exposures had low slopes and R2 values ; the personal-ambient NO2 association in the fall season was moderate. For both particles and gases, personal-ambient associations were highest for individuals spending most of their time in high- compared with low-ventilated environments. Cross-pollutant models indicated that ambient particle concentrations were much better surrogates for exposure to particles than to gases. With the exception of ambient NO2 in the fall, which showed moderate associations with personal exposures, ambient gases were poor proxies for both gas and particle exposures. In combination, our results suggest that a) ventilation may be an important modifier of the magnitude of effect in time-series health studies, and b) results from time-series health studies based on 24-hr ambient concentrations are more readily interpretable for particles than for gases. Key words: air pollution, ambient concentration, confounding, epidemiology, nitrogen dioxide, ozone, particle components, personal exposure, PM2.5, sulfur dioxide. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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