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Early life swimming pool exposure and asthma onset in children: a case-control study
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine. The OLIN studies, Luleå, Sweden..
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine. The OLIN studies, Luleå, Sweden.
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine.
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine.
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2018 (English)In: Environmental health, ISSN 1476-069X, E-ISSN 1476-069X, Vol. 17, article id 34Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Trichloramine exposure in indoor swimming pools has been suggested to cause asthma in children. We aimed to investigate the risk of asthma onset among children in relation to individual trichloramine exposure.

METHODS: A longitudinal nested case-control study of 337 children with asthma (cases) and 633 controls aged 16-17 years was performed within a population-based cohort from The Obstructive Lung Disease in Northern Sweden studies (OLIN). Year of asthma onset and exposure time at different ages were obtained in telephone interviews. Trichloramine concentrations in the pool buildings were measured. Skin prick test results for inhalant allergens were available from previous examinations of the cohort. The risk for asthma was analyzed in relation to the cumulative trichloramine exposure before onset of asthma.

RESULTS: Swimming pool exposure in early life was associated with a significantly higher risk of pre-school asthma onset. A dose-response relationship between swimming pool exposure and asthma was indicated in children with asthma onset at 1 year of age. Children who were both sensitized and exposed had a particularly high risk.

CONCLUSIONS: Early life exposure to chlorinated swimming pool environments was associated with pre-school asthma onset.

Place, publisher, year, edition, pages
BioMed Central, 2018. Vol. 17, article id 34
Keywords [en]
Asthma, Children, Swimming, Trichloramine
National Category
Occupational Health and Environmental Health
Identifiers
URN: urn:nbn:se:umu:diva-146654DOI: 10.1186/s12940-018-0383-0ISI: 000429733700001PubMedID: 29642932OAI: oai:DiVA.org:umu-146654DiVA, id: diva2:1197921
Available from: 2018-04-16 Created: 2018-04-16 Last updated: 2018-06-09Bibliographically approved

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Andersson, MartinBackman, HelenaNordberg, GunnarHagenbjörk, AnnikaHedman, LinneaEriksson, KåreForsberg, BertilRönmark, Eva

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