In:
International Journal of Health Geographics, Springer Science and Business Media LLC, Vol. 4, No. 1 ( 2005-12)
Abstract:
Numerous studies have shown that exposure to air pollutants in the area of residence and the socio-economic status of an individual may be related. Therefore, when conducting an epidemiological study on the health effect of air pollution, socio-economy may act as a confounding factor. In this paper we examine to what extent socio-economic status and concentrations of NO 2 in the county/region of Scania, southern Sweden, are associated and if such associations between these factors differ when studying them at county or city level. To perform this study we used high-resolution census data and modelled the annual exposure to NO 2 using an emission database, a dispersion modelling program and a geographical information system (GIS). Results The results from this study confirm that socio-economic status and the levels of NO 2 in the area of residence are associated in some cities. The associations vary considerably between cities within the same county (Scania). Even for cities of similar sizes and population bases the associations observed are different. Studying the cities together or separately yields contradictory results, especially when education is used as a socio-economic indicator. Conclusion Four conclusions have been drawn from the results of this study. 1) Adjusting for socio-economy is important when investigating the health effects of air pollution. 2) The county of Scania seems to be heterogeneous regarding the association between air pollution and socio-economy. 3) The relationship between air pollution and socio-economy differs in the five cities included in our study, depending on whether they are analysed separately or together. It is therefore inadvisable to determine and analyse associations between socio-economy and exposure to air pollutants on county level. This study indicates that the size and choice of study area is of great importance. 4) The selection of socio-economic indices (in this study: country of birth and education level ) is important.
Type of Medium:
Online Resource
ISSN:
1476-072X
DOI:
10.1186/1476-072X-4-30
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2005
detail.hit.zdb_id:
2091613-9
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