George Mason University
George Mason University Mason
George Mason University

Sorina Eftim

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Dr. Sorina Eftim is an adjunct professor in the Department of Global and Community Health. Her research interests are evaluating the health effects of exposures to air pollution, environmental epidemiology, and cancer epidemiology. Dr. Eftim also leads efforts requiring the analysis and performance of human health risk assessments, and conducts literature reviews and meta-analyses. Dr. Eftim has extensive teaching experience in biostatistics at the undergraduate and graduate level. She is also a Senior Technical Specialist at ICF, where she leads environmental risk and toxicology projects. She  is also an member of the Advisory Board in the Department of Global and Community Health.


PhD, Environmental Health Sciences, Johns Hopkins University Bloomberg School of Public Health (2007)

MHS, Biostatistics, Johns Hopkins University Bloomberg School of Public Health (2005)

MS, Applied Statistics and Optimizations, University of Bucharest, Romania (2000)

BS, Mathematics and Computer Sciences, University of Pitesti, Romania (1998)

Personal Websites:


Research Interests

  • Biostatistics
  • Epidemiology
  • Risk Assessment
  • Systematic Review
  • Meta-Analysis

Select Publications

Nappier, S.P., Soller, J.A., Eftim, S. E. (2018). Potable Water Reuse: What Are the Microbiological Risks? Curr Envir Health Rpt (2018).

Soller, J.A., Eftim, S. E., Nappier, S.P. (2017). Direct potable reuse microbial risk assessment methodology: Sensitivity analysis and application to State log credit allocations. Water Research 128, 286-292.

Morgan, R., Eftim, S.E., Guyatt, G., Ross, P., Goldstone, A., Schünemann, H., Blain, R., Santesso, N., Holloway, A., Thayer, K. (2017) Evaluation of the Application of Risk of Bias in Non-randomized Studies of Interventions (ROBINS-I) to Environmental Exposure Studies. Environment International (in review)

Eftim, S.E., Hong, T., Soller, J., Boehm, A.B., Warren, I., Ichida, A., & Nappier, S.P. (2017) Occurrence of norovirus in raw sewage: a systematic review and meta-analysis. Water Research 111, 366-374.

Mendez, W.M. Jr., Eftim, S.E., Cohen, J., Warren, I., Cowden, J., Lee, J.S., & Sams. R. (2016). Relationships between arsenic concentrations in drinking water and lung and bladder cancer incidence in U.S. counties. Journal of Exposure Science and Environmental Epidemiology, 27(3): 235-243

Soller, J., Eftim, S. E., Warren, I., & Nappier, S.P. (2016). Evaluation of microbiological risks associated with direct potable reuse. Microbial Risk Analysis, 5: 3-14

Soller, J., Eftim, S. E., Wade, T. J., Ichida, A., Clancy, J., Johnson, T., Schwab, K., Ramirez-Toro, G., Nappier, S.P, & Ravenscroft, J.  (2015). Use of quantitative microbial risk assessment to improve interpretation of a recreational water epidemiological study. Microbial Risk Analysis. 1:2–11.

Morgan, R.L., Thayer, K., Guyatt, G.H., Blain, R., Eftim, S.E., Ross, P., Santesso, N., Holloway, A.C., Schunaman, H.J. (2015) Assessing the usability of ACROBAT-NRSI for studies of exposure and intervention in environmental health research. Cochrane Colloquium.

Le, G.E., Breysse, P.N., McDermott, A., Eftim, S.E., Geyh, A., Berman, J., & Curriero, F.C. (2014). Canadian forest fires and the effects of long-range transboundary air pollution on hospitalizations among the Elderly. SPRS International Journal of Geo-Information. 2(2), 38–48.

Soller, J., Schoen, M., Varghese, A., Ichida, A., Boehm, A., & Eftim, S. E., et al. (2014). Human health risk implications of multiple sources of faecal indicator bacteria in a recreational waterbody. Water Research, 66:254–264.

Warren, I., & Eftim, S. E. (2013). Uses of publically available data in risk assessment. In B. Fowler (Ed.), Computational toxicology, methods and applications for risk assessment (pp. 151–170). New York, NY: Academic Press, Elsevier.

Fox, J., Eftim, S.E., Lees, P., Spannhake, E., Torrey, C., Mihalic, J., & Macri, K. (2013). Characterization of a portable method for the collection of exhaled breath condensate and subsequent analysis of metal content. Environmental Science: Processes & Impact 15(4):721–729.

Mendez, W., & Eftim, S.E. (2012). Biomarkers of perchlorate exposure are correlated with circulating thyroid hormone levels in the 2007–2008 NHANES. Environmental Research 118: 134–144.

Marcell, A.V., Eftim, S.E., Sonensteinm F.L., Pleckm J.H. (2011). Associations of family and peer experiences with masculinity attitude trajectories at the individual and group level in adolescent and young adult males. Men & Masculinities 14: 565–587.

Eftim, S.E., Samet, J., Janes, H., McDermott, A., Dominici, F. (2008). Fine particulate matter and mortality: A comparison of the six cities and American Cancer Society cohorts with a Medicare cohort. Epidemiology, 19(2), 209–216.

Eftim, S.E., & Dominici, F. (2005). Multisite time-series studies versus cohort studies: methods, findings and policy implications. Journal of Toxicology and Environmental Health, Part A, 68(13-14): 1191–1205.

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