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Spatial analysis of air pollution and childhood asthma in Hamilton, Canada: comparing exposure methods in sensitive subgroups
BACKGROUND: Variations in air pollution exposure within a community may be associated with asthma prevalence. However, studies conducted to date have produced inconsistent results, possibly due to errors in measurement of the exposures. METHODS: A standardized asthma survey was administered to child...
Autores principales: | , , , , , , , |
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Formato: | Texto |
Lenguaje: | English |
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BioMed Central
2009
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2669065/ https://www.ncbi.nlm.nih.gov/pubmed/19338672 http://dx.doi.org/10.1186/1476-069X-8-14 |
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author | Sahsuvaroglu, Talar Jerrett, Michael Sears, Malcolm R McConnell, Rob Finkelstein, Norm Arain, Altaf Newbold, Bruce Burnett, Rick |
author_facet | Sahsuvaroglu, Talar Jerrett, Michael Sears, Malcolm R McConnell, Rob Finkelstein, Norm Arain, Altaf Newbold, Bruce Burnett, Rick |
author_sort | Sahsuvaroglu, Talar |
collection | PubMed |
description | BACKGROUND: Variations in air pollution exposure within a community may be associated with asthma prevalence. However, studies conducted to date have produced inconsistent results, possibly due to errors in measurement of the exposures. METHODS: A standardized asthma survey was administered to children in grades one and eight in Hamilton, Canada, in 1994–95 (N ~1467). Exposure to air pollution was estimated in four ways: (1) distance from roadways; (2) interpolated surfaces for ozone, sulfur dioxide, particulate matter and nitrous oxides from seven to nine governmental monitoring stations; (3) a kriged nitrogen dioxide (NO(2)) surface based on a network of 100 passive NO(2 )monitors; and (4) a land use regression (LUR) model derived from the same monitoring network. Logistic regressions were used to test associations between asthma and air pollution, controlling for variables including neighbourhood income, dwelling value, state of housing, a deprivation index and smoking. RESULTS: There were no significant associations between any of the exposure estimates and asthma in the whole population, but large effects were detected the subgroup of children without hayfever (predominately in girls). The most robust effects were observed for the association of asthma without hayfever and NO(2)LUR OR = 1.86 (95%CI, 1.59–2.16) in all girls and OR = 2.98 (95%CI, 0.98–9.06) for older girls, over an interquartile range increase and controlling for confounders. CONCLUSION: Our findings indicate that traffic-related pollutants, such as NO(2), are associated with asthma without overt evidence of other atopic disorders among female children living in a medium-sized Canadian city. The effects were sensitive to the method of exposure estimation. More refined exposure models produced the most robust associations. |
format | Text |
id | pubmed-2669065 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2009 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-26690652009-04-15 Spatial analysis of air pollution and childhood asthma in Hamilton, Canada: comparing exposure methods in sensitive subgroups Sahsuvaroglu, Talar Jerrett, Michael Sears, Malcolm R McConnell, Rob Finkelstein, Norm Arain, Altaf Newbold, Bruce Burnett, Rick Environ Health Research BACKGROUND: Variations in air pollution exposure within a community may be associated with asthma prevalence. However, studies conducted to date have produced inconsistent results, possibly due to errors in measurement of the exposures. METHODS: A standardized asthma survey was administered to children in grades one and eight in Hamilton, Canada, in 1994–95 (N ~1467). Exposure to air pollution was estimated in four ways: (1) distance from roadways; (2) interpolated surfaces for ozone, sulfur dioxide, particulate matter and nitrous oxides from seven to nine governmental monitoring stations; (3) a kriged nitrogen dioxide (NO(2)) surface based on a network of 100 passive NO(2 )monitors; and (4) a land use regression (LUR) model derived from the same monitoring network. Logistic regressions were used to test associations between asthma and air pollution, controlling for variables including neighbourhood income, dwelling value, state of housing, a deprivation index and smoking. RESULTS: There were no significant associations between any of the exposure estimates and asthma in the whole population, but large effects were detected the subgroup of children without hayfever (predominately in girls). The most robust effects were observed for the association of asthma without hayfever and NO(2)LUR OR = 1.86 (95%CI, 1.59–2.16) in all girls and OR = 2.98 (95%CI, 0.98–9.06) for older girls, over an interquartile range increase and controlling for confounders. CONCLUSION: Our findings indicate that traffic-related pollutants, such as NO(2), are associated with asthma without overt evidence of other atopic disorders among female children living in a medium-sized Canadian city. The effects were sensitive to the method of exposure estimation. More refined exposure models produced the most robust associations. BioMed Central 2009-04-01 /pmc/articles/PMC2669065/ /pubmed/19338672 http://dx.doi.org/10.1186/1476-069X-8-14 Text en Copyright ©2009 Sahsuvaroglu et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Sahsuvaroglu, Talar Jerrett, Michael Sears, Malcolm R McConnell, Rob Finkelstein, Norm Arain, Altaf Newbold, Bruce Burnett, Rick Spatial analysis of air pollution and childhood asthma in Hamilton, Canada: comparing exposure methods in sensitive subgroups |
title | Spatial analysis of air pollution and childhood asthma in Hamilton, Canada: comparing exposure methods in sensitive subgroups |
title_full | Spatial analysis of air pollution and childhood asthma in Hamilton, Canada: comparing exposure methods in sensitive subgroups |
title_fullStr | Spatial analysis of air pollution and childhood asthma in Hamilton, Canada: comparing exposure methods in sensitive subgroups |
title_full_unstemmed | Spatial analysis of air pollution and childhood asthma in Hamilton, Canada: comparing exposure methods in sensitive subgroups |
title_short | Spatial analysis of air pollution and childhood asthma in Hamilton, Canada: comparing exposure methods in sensitive subgroups |
title_sort | spatial analysis of air pollution and childhood asthma in hamilton, canada: comparing exposure methods in sensitive subgroups |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2669065/ https://www.ncbi.nlm.nih.gov/pubmed/19338672 http://dx.doi.org/10.1186/1476-069X-8-14 |
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