Impact/Purpose:
The primary study objective is to quantify the association(s) between day-to-day or experimental variations in ambient air particle mass concentrations and selected physiological functions in elderly persons living in a retirement centers or involved in selected clinical studies. The NERL will conduct exposure studies and provide real-time and integrated PM mass concentration and selected criteria pollutant data to assist the NHEERL collaborators conducting physiological monitoring in establishing selected health effect associations resulting from potential human exposures to PM-related air pollutants.
Description:
This task will continue ORD's efforts to develop a biologically plausible, quantitative health risk model for particulate matter (PM) based on epidemiological, toxicological, and mechanistic studies using matched exposure assessments. The NERL, in collaboration with the NHEERL, will conduct prospective exposure-epidemiological studies upon cohorts of potentially susceptible subpopulations. For groups at higher risk for health effects associated with PM exposures, it should be possible to detect physiological changes in these persons with day-to-day changes in ambient PM mass concentrations. It should also be possible to establish the relative contribution of PM origin (outdoor/indoor/personal activities) to total PM exposure and use these factors to develop personal exposure models.
Keywords:
PARTICULATE MATTER, SUSCEPTIBLE POPULATIONS,
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Project Information:
Progress
:The NERL has collaborated extensively with the NHEERL in a series of 1997-2000 longitudinal investigations of the associations of PM-related ambient air pollutants and observed human health effects. The NERL has provided to the NHEERL, real-time and integrated PM mass concentration data from four previously conducted integrated field studies (1997 and 1998 studies in Baltimore, MD and two 1999 studies in Fresno, CA) . This support has included measures such as airborne concentrations of elemental species, and acid aerosols. Statistical analysis is ongoing using an integrated data base. In FY00, NERL initiated new panel studies in Raleigh and Chapel Hill, NC (see task 5676) for which the field component will be completed in 2001. In these studies, NERL is collecting both the exposure and health effect data but will collaborate with NHEERL to assess exposure/health relationships.
Relevance
:Population exposure-epidemiological studies will provide information to meet GPRA goal #1, Objective1. By 2003, develop a biologically plausible, quantitative health risk model for particulate matter based on epidemiological, toxicological, and mechanistic studies. The work directly responds to the NRC Research Topic 8: "What subpopulations are at increased risk of adverse health outcomes from PM?" (NRC, 1998). Results from this collaboration and associated studies will be used to refine models for biological mechanisms and exposure. Peer reviewed results from these studies will be included in the current 2002 PM Criteria Document and support the next CD in 2007.
Clients
:EPA/ORD/NHEERL, EPA/NCEA- for criteria document review, EPA/OAR, NRC, Scientific community.
Project IDs:
ID Code
:3912
Project type
:OMIS