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Total cancer incidence in relation to 137Cs fallout in the most contaminated counties in Sweden after the Chernobyl nuclear power plant accident: a register-based study
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Occupational and Environmental Medicine. (Magnus Svartengren)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Occupational and Environmental Medicine. (Magnus Svartengren)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Occupational and Environmental Medicine. (Magnus Svartengren)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Occupational and Environmental Medicine. (Magnus Svartengren)
2016 (English)In: BMJ Open, ISSN 2044-6055, E-ISSN 2044-6055, Vol. 6, no 12, article id e011924Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES: To determine the total cancer incidence in relation to a 5-year exposure to caesium-137 ((137)Cs) from the 1986 Chernobyl nuclear power plant accident.

METHODS: A closed cohort was defined as all individuals living in the three most contaminated counties in mid-Sweden in 1986. Fallout of (137)Cs was retrieved as a digital map from the Geological Survey of Sweden, demographic data from Statistics Sweden, and cancer diagnosis from the National Board of Health and Welfare. Individuals were assigned an annual (137)Cs exposure based on their place of residence (1986-1990), from which 5-year cumulative (137)Cs exposures were calculated, accounting for the physical decay of (137)Cs and changing residencies. HRs were adjusted for age, sex, rural/non-rural residence and pre-Chernobyl total cancer incidence.

RESULTS: The 734 537 people identified were categorised by exposure: the first quartile was low exposure (0.0-45.4 kBq/m(2)), the second and third quartiles were intermediate exposure (45.41-118.8 kBq/m(2)), and the fourth quartile was the highest exposure (118.81-564.71 kBq/m(2)). Between 1991 and 2010, 82 495 cancer cases were registered in the 3 counties. Adjusted HRs (95% CI) were 1.03 (1.01 to 1.05) for intermediate exposure and 1.05 (1.03 to 1.07) for the highest exposure compared to the reference exposure.

CONCLUSIONS: We found a small overall exposure-response pattern of the total cancer incidence related to (137)Cs after adjustment for age, sex, rural residence and pre-Chernobyl cancer incidence.

Place, publisher, year, edition, pages
2016. Vol. 6, no 12, article id e011924
National Category
Occupational Health and Environmental Health
Identifiers
URN: urn:nbn:se:uu:diva-311895DOI: 10.1136/bmjopen-2016-011924ISI: 000391303600003PubMedID: 27998898OAI: oai:DiVA.org:uu-311895DiVA, id: diva2:1061751
Available from: 2017-01-03 Created: 2017-01-03 Last updated: 2018-01-13Bibliographically approved

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