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Exposure Research

Human Exposure & Atmospheric Sciences Staff

Lisa Baxter

Title: Environmental Health Scientist

EPA Division: Human Exposure and Atmospheric Sciences Division

EPA Branch: Exposure Modeling Research Branch

Narrative:
The biggest challenge in air pollution health studies is the lack of a complete set of pertinent exposure data. Most epidemiologic studies investigating the association between an air pollutant and an adverse health outcome estimate exposure by using values from a single stationary monitor or average concentrations of a limited number monitoring stations within a community. Ideally, exposures would be estimated by measuring pollutant levels on each subject. In large epidemiological studies, it is often impractical to collect direct quantitative measures of exposure on all subjects; therefore reasonable proxies need to be developed. The focus of Lisa’s current research activities is the evaluation and integration of exposure models in order to improve human exposure estimates for air pollution epidemiology studies.

Education/Training:

  • Sc.D., Environmental Health, Harvard School of Public Health, 2007
  • S.M., Environmental Health, Harvard School of Public Health, 2004
  • B.S., Biology and Environmental Studies, Tufts University, 2000

Professional Experience:

  • Environmental Health Scientist, USEPA, ORD, NERL-HEASD, RTP, NC 2007-present
  • In-Vivo Toxicologist Associate, Toxicon Corporation, Beford, MA 2001-2002

Professional Societies and Affiliations:

  • Member of the International Society of Exposure Science

Select Awards and Honors:

  • USEPA National Honor Awards, Bronze Medal for Commendable Service, 2012
  • USEPA National Honor Awards, Silver Medal for Superior Service, 2009
  • US Public Health training grant through the National Institute for Occupational Safety and Health, 2002-2004

Select Presentations:

  • Baxter, LK and T Long (October/November 2012). “Introduction to multipollutant exposure metrics and their application to air pollution epidemiological studies.” Annual Conference of the International Society of Exposure Science. Seattle, WA
  • Baxter, LK, J. Burke, M. Lunden, J. Crooks, N. Hodas, B. J. Turpin, D. Rich, K. Thevenet-Morrison, H. Ozkaynak (October/November 2011). “Comparison of Five Different Exposure Surrogates Used in Two Established Epidemiological Studies in New Jersey.” Annual Conference of the International Society of Exposure Science. Baltimore, MD.
  • Baxter, LK (September 2010). “Introduction of Modeling Pollutant Exposures and Assessing ‘At Risk’ Populations. “The 28th Symposium of the Veterinary Comparative Respiratory Society. Raleigh, NC.
  • Baxter, LK, TM Barzyk, J Burke, B Turpin, D Rich, M Lunden, N Hodes, and H Özkaynak(August 2010). “Comparison of Exposures Estimated Using Ambient PM2.5 Concentrations with those estimated by the Stochastic Human Exposure and Dose Simulation Model (SHEDS) for two New Jersey cohorts.” Joint Conference of the International Society for Environmental Epidemiology and the International Society of Exposure Science. Seoul, South Korea
  • Baxter, LK, S Teet, and LM Neas. “Identifying Cities for Enhanced Fine Particulate Speciation Monitoring (August 2010). Joint Conference of the International Society for Environmental Epidemiology and the International Society of Exposure Science. Seoul, South Korea
  • Baxter, LK, TM Barzyk, AF Vette, C Croghan, and RW Williams (October 2008). “Contributions of Diesel Truck Emissions to Indoor Elemental Carbon Concentrations in Homes in Proximity to Ambassador Bridge.” Joint Conference of the International Society for Environmental Epidemiology and the International Society of Exposure Science. Pasadena, CA

Select Publications:

  • Baxter, LK, RM Duvall, and J Sacks (2013). “Examining the Effects of Air Pollution Composition on Within Region Differences in PM2.5 Mortality Risk Estimates.” Journal of Exposure Science and Environmental Epidemiology. doi: 10.1038/jes.2012.114.
  • Baxter, LK, J Burke, MM Lunden, BJ Turpin, DQ Rich, K Thevenet-Morrison, N Hodas, and H Özkaynak (2013). “Influence of Human Activity Patterns, Particle Composition, and Residential Air Exchange Rates on Modeled Distributions of PM2.5 Exposure Compared to Central-site Monitoring Data.” Journal of Exposure Science and Environmental Epidemiology. doi:10.1038/jes.2012.118.
  • Özkaynak H, LK Baxter, K Dionisio, and J Burke (2013). “Air Pollution Exposure Prediction Approaches Used in Air Pollution Epidemiology Studies” Journal of Exposure Science and Environmental Epidemiology. (accepted).
  • Baxter,LK, H Ozkaynak, M Franklin, BD Schultz, and LM Neas (2011). “The Use of Improved Exposure Factors in the Interpretation of Air Pollution Epidemiological Results.” Air Quality, Atmosphere, and Health DOI 10.1007/s11869-011-0160-5
  • Lobell, DT, V Isakov, LK Baxter, JS Touma, MB Smuts, H Ozkaynak (2011). “Feasibility of Assessing Public Health Impacts of Air Pollution Reduction Programs in a Local Scale: New Haven Accountability Case Study.” Environmental Health Perspectives 119: 487-493.
  • Levy, JI, JE Clougherty, LK Baxter, EA Housemann, and CJ Paciorek (2010). “Evaluating Heterogeneity in Indoor and Outdoor Air Pollution Using Land-Use Regression Models and Constrained Factor Analysis.” Health Effects Institute. Research Report No. 152.

Published & Presented Research (1999-Present)

Contact Info:
Lisa Baxter
Human Exposure & Atmospheric Sciences Division
National Exposure Research Laboratory
US EPA Office of Research and Development
109 TW Alexander Drive
Research Triangle Park, NC 27709
Telephone: 919-541-0672
Email: baxter.lisa@epa.gov

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