Impact of Microenvironmental Nitrogen Dioxide Concentrations on Personal Exposures in Australia |
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| Authors: | Kiyoung Lee Wonho Yang Neville D Bofinger |
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| Institution: | 1. Department of Epidemiology and Preventive Medicine , University of California at Davis;2. Center for Public Health Research, School of Public Health , Queensland University of Technology , Brisbane , Queensland , Australia lee@ucdavis.edu;4. Center for Public Health Research, School of Public Health , Queensland University of Technology , Brisbane , Queensland , Australia;5. School of Natural Resource Sciences , Queensland University of Technology , Brisbane , Queensland , Australia |
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| Abstract: | ABSTRACT Indoor and outdoor NO2 concentrations were measured and compared with simultaneously measured personal exposures of 57 office workers in Brisbane, Australia. House characteristics and activity patterns were used to determine the impacts of these factors on personal exposure. Indoor NO2 levels and the presence of a gas range in the home were significantly associated with personal exposure. The time-weighted average of personal exposure was estimated using NO2 measurements in indoor home, indoor workplace, and outdoor home levels. The estimated personal exposures were closely correlated, but they significantly underestimated the measured personal exposures. Multiple regression analysis using other nonmeasured microenvironments indicated the importance of transportation in personal exposure models. The contribution of transportation to the error of prediction of personal exposure was confirmed in the regression analysis using the multinational study database. |
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