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Title: Residential exposure to motor vehicle emissions and the risk of wheezing among 7-8 year-old schoolchildren in Nicosia, Cyprus.
Authors: Middleton, Nicos
Nicolaou, Nicolaos C.
Pipis, Spiros D.
Zeniou, Maria
Kleanthous, Savvas
Demokritou, Philip
Yiallouros, Panayiotis K.
Koutrakis, Petros
Scientific Field: Medical and Health Sciences
Scientific Field: Clinical Medicine
Subjects: Asthma
Air pollution
Geographical Information Systems
Distance to main roads
Issue Date: 2009
Publisher: Springer
Citation: European Journal of Epidemiology, Volume 24, Supplement 1 / September, 2009
Abstract: Background: First-time investigation into the frequency of asthmatic symptoms among Cypriot children showed increased prevalence in the capital compared to all other areas. Exposure to traffic pollutants have been repeatedly shown to be associated with a range of cardiorespiratory effects. Differences in asthma prevalence on an island the size of Cyprus may reflect such environmental factors. Objective: To investigate the association between residential exposure to traffic pollution and the risk of asthmatic symptoms within the city of Nicosia. Methods: The addresses of participating children in Nicosia were geo-coded (N = 1,735) and levels of exposure were assessed using both (a) distance-based and (b) emissions-based indicators e.g. estimated levels of traffic pollutants at all roads within a pre-defined distance around the residence. Odds ratios of self-reported symptoms in relation to exposure were estimated in logistic regression models adjusting for person-based risk factors and co-morbidity as well as intra-school clustering. Results: Up to 2-fold differences in symptoms were observed; however, increased risk seemed to concentrate at distances less than 50 m from a main road and/or only among those experiencing the highest levels of cumulative exposure. Associations persisted after adjusting for other risk factors. While the direction of effect was apparent at longer distances, differences were not statistically significant. Adjusted odds ratios for current wheezing were 2.33 (95% CI 1.27, 4.30) amongst the quartile of participants exposed to the highest levels of particulate matter (PM) at all roads 50 m of their residence and 2.14 (95% CI 1.05, 4.35) for levels of nitrogen oxides (NOx). Conclusions: Children with the highest vehicular emissions burden around their residence seem to be at higher risk of reporting symptoms. However, due to the small number of children residing at close proximity to main roads and with no evidence of effect at longer distances, this alone would not explain the generally higher prevalence observed in the urban areas in Nicosia.
Description: Presented at the International Epidemiological Association (IEA) and European Epidemiology Federation (EEF)Congress of Epidemiology, Warsaw, 2009.
Type: Abstract
ISSN: 1573-7284 (Online)
Rights: © Springer
Affiliation: Harvard School of Public Health
Air Quality Section, Department of Labor Inspection
Wythenshawe Hospital
Cyprus Univeristy of Technology
Country: United States
United Kingdom
Journal Type: Open Access
Appears in Collections:Περιλήψεις/Abstracts

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