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Childhood asthma in four regions in Scandinavia: risk factors and avoidance effects
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Environmental Medicine.
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1997 (English)In: International Journal of Epidemiology, ISSN 0300-5771, E-ISSN 1464-3685, Vol. 26, no 3, 610-619 p.Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: The high and increasing prevalence of childhood asthma is a major public health issue. Various risk factors have been proposed in local studies with different designs.

METHODS: We have made a questionnaire study of the prevalence of childhood asthma, potential risk factors and their relations in four regions in Scandinavia (Umeå and Malmö in Sweden, Kuopio in eastern Finland and Oslo, Norway). One urban and one less urbanized area were selected in each region, and a study group of 15962 children aged 6-12 years was recruited.

RESULTS: The prevalence of symptoms suggestive of asthma varied considerably between different areas (dry cough 8-19%, asthma attacks 4-8%, physician-diagnosed asthma 4-9%), as did the potential risk factors. Urban residency was generally not a risk factor. However, dry cough was common in the most traffic polluted area. Exposure to some of the risk factors. such as smoking indoors and moisture stains or moulds at home during the first 2 years of life, resulted in an increased risk. However, current exposure was associated with odds ratios less than one.

CONCLUSIONS: Our findings were probably due to a combination of early impact and later avoidance of these risk factors. The effects of some risk factors were found to differ significantly between regions. No overall pattern between air pollution and asthma was seen, but air pollution differed less than expected between the areas.

Place, publisher, year, edition, pages
1997. Vol. 26, no 3, 610-619 p.
National Category
Environmental Health and Occupational Health
Identifiers
URN: urn:nbn:se:umu:diva-61318DOI: 10.1093/ije/26.3.610PubMedID: 9222787OAI: oai:DiVA.org:umu-61318DiVA: diva2:566706
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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Citation style
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