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Air pollution levels, meteorological conditions and asthma symptoms
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Epidemiology and Public Health Sciences.
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1993 (English)In: European Respiratory Journal, ISSN 0903-1936, E-ISSN 1399-3003, Vol. 6, no 8, 1109-1115 p.Article in journal (Refereed) Published
Abstract [en]

We wanted to assess relations between the daily occurrence of asthma symptoms and fluctuations of air pollution concentrations and meteorological conditions. In a panel of 31 asthmatic patients residing in the town of Piteå in northern Sweden, severe symptoms of shortness of breath, wheeze, cough and phlegm were recorded in an asthma diary together with suspected causes. Sulphur dioxide, nitrogen dioxide, black smoke, relative humidity and temperature were used to evaluate the relationship to the environment. By using multivariate analyses, we found that daily variations in the particulate pollution levels, indicated by black smoke levels below the criteria limits, had significant effects on the risk of developing severe symptoms of shortness of breath. This association was stronger among 10 subjects, who had at least five incident days with severe shortness of breath. Meteorological conditions were not significant in the multivariate models. Cough and phlegm did not show significant relationships to any environmental condition that was evaluated. Only one-third of the subjects reported, at least once during the study, symptoms believed to be related to air pollutants, although we found significant correlations between the pollution levels and the frequency of pollution-related symptoms. We conclude that an association has been established for black smoke as pollutant and shortness of breath as respiratory symptom, and that in certain asthmatics, effects were occurring at lower particulate levels than suggested previously.

Place, publisher, year, edition, pages
1993. Vol. 6, no 8, 1109-1115 p.
National Category
Environmental Health and Occupational Health
Identifiers
URN: urn:nbn:se:umu:diva-61316PubMedID: 8224125OAI: oai:DiVA.org:umu-61316DiVA: diva2:566718
Available from: 2012-11-09 Created: 2012-11-09 Last updated: 2017-12-07Bibliographically approved
In thesis
1. Urban air quality and indicators of respiratory problems
Open this publication in new window or tab >>Urban air quality and indicators of respiratory problems
1997 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Umeå: Umeå University, 1997. 77 p.
Series
Umeå University medical dissertations, ISSN 0346-6612 ; 552
Keyword
air pollution, respiratory symptoms, asthma, annoyance reactions, environmental epidemiology
National Category
Environmental Health and Occupational Health
Identifiers
urn:nbn:se:umu:diva-7535 (URN)91-7191-361-0 (ISBN)
Supervisors
Available from: 2008-01-10 Created: 2008-01-10 Last updated: 2012-11-09Bibliographically approved

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