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Impact of microenvironments and personal activities on personal PM2.5 exposures among asthmatic children

Citation

Van Ryswyk, K and Wheeler, AJ and Wallace, L and Kearney, J and You, H and Kulka, R and Xu, X, Impact of microenvironments and personal activities on personal PM2.5 exposures among asthmatic children, Journal of Exposure Science and Environmental Epidemiology, 24, (3) pp. 260-8. ISSN 1559-0631 (2014) [Refereed Article]


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Copyright Statement

Copyright 2014 Nature America, Inc

DOI: doi:10.1038/jes.2013.20

Abstract

Personal activity patterns have often been suggested as a source of unexplained variability when comparing personal particulate matter (PM2.5) exposure to modeled data using central site or microenvironmental data. To characterize the effect of personal activity patterns on asthmatic children's personal PM2.5 exposure, data from the Windsor, Ontario Exposure Assessment Study were analyzed. The children spent on an average 67.112.7% (winter) and 72.322.6% (summer) of their time indoors at home where they received 51.714.8% and 66.319.0% of their PM2.5 exposure, respectively. In winter, 17.75.9% of their time was spent at school where they received 38.611.7% of their PM2.5 exposure. In summer, they spent 10.311.8% 'indoors away from home', which represented 23.418.3% of their PM2.5 exposure. Personal activity codes adapted from those of the National Human Activity Pattern Survey and the Canadian Human Activity Pattern Survey were assigned to the children's activities. Of the over 100 available activity codes, 19 activities collectively encompassed nearly 95% of their time. Generalized estimating equation (GEE) models found that, while indoors at home, relative to daytime periods when sedentary activities were conducted, several personal activities were associated with significantly elevated personal PM2.5 exposures. Indoor playing represented a mean increase in PM2.5 of 10.1 μg/m(3) (95% CI 6.3-13.8) and 11.6 μg/m(3) (95% CI 8.1-15.1) in winter and summer, respectively, as estimated by a personal nephelometer.

Item Details

Item Type:Refereed Article
Keywords:particulate matter, personal exposure, activity patterns
Research Division:Medical and Health Sciences
Research Group:Public Health and Health Services
Research Field:Environmental and Occupational Health and Safety
Objective Division:Health
Objective Group:Public Health (excl. Specific Population Health)
Objective Field:Environmental Health
Author:Wheeler, AJ (Dr Amanda Wheeler)
ID Code:101130
Year Published:2014
Web of Science® Times Cited:18
Deposited By:Menzies Institute for Medical Research
Deposited On:2015-06-10
Last Modified:2017-11-03
Downloads:138 View Download Statistics

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