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Estimating the effects of environmental exposures using a weighted mean of monitoring stations

Barnett, A.G., Clements, A.C.A., & Vaneckova, P. (2012) Estimating the effects of environmental exposures using a weighted mean of monitoring stations. Spatial and Spatio-temporal Epidemiology, 3(3), pp. 225-234.

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Abstract

The health effects of environmental hazards are often examined using time series of the association between a daily response variable (e.g., death) and a daily level of exposure (e.g., temperature). Exposures are usually the average from a network of stations. This gives each station equal importance, and negates the opportunity for some stations to be better measures of exposure. We used a Bayesian hierarchical model that weighted stations using random variables between zero and one. We compared the weighted estimates to the standard model using data on health outcomes (deaths and hospital admissions) and exposures (air pollution and temperature) in Brisbane, Australia. The improvements in model fit were relatively small, and the estimated health effects of pollution were similar using either the standard or weighted estimates. Spatial weighted exposures would be probably more worthwhile when there is either greater spatial detail in the health outcome, or a greater spatial variation in exposure.

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ID Code: 53390
Item Type: Journal Article
Keywords: air pollution, temperature, spatial
DOI: 10.1016/j.sste.2012.02.010
ISSN: 1877-5845
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PUBLIC HEALTH AND HEALTH SERVICES (111700) > Epidemiology (111706)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Public Health & Social Work
Copyright Owner: Copyright 2012 Elsevier BV
Copyright Statement: This is the author’s version of a work that was accepted for publication in Spatial and Spatio-temporal Epidemiology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Spatial and Spatio-temporal Epidemiology, [VOL 3, ISSUE 3, (2012)] DOI: 10.1016/j.sste.2012.02.010
Deposited On: 30 Aug 2012 14:53
Last Modified: 09 Sep 2013 15:50

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