NDLI: Incidence of thyroid cancer in Scandinavia following fallout from atomic bomb testing: an analysis of birth cohorts

Content Provider	Springer Nature Link
Author	Lund, Eiliv Galanti, Maria Rosaria
Copyright Year	1999
Abstract	Objectives: The occurrence relation between radioactive fallout from nuclear testing at Novaja Semlja in north-west Russia and the incidence of thyroid cancer in Norway and Sweden was studied following a birth cohort approach.Methods: Birth cohorts with presumably different levels of exposure were identified according to calendar year of atomic tests and previous Norwegian estimates of the population dose (born 1947–1950 received low exposure in late childhood, born 1951–1962 received the highest exposure in early childhood, born 1963–1970 were not exposed). For each one-year birth cohort the incidence rates were calculated, with denominators based on exact population figures for each year of follow-up.Results: In a stratified analysis, the relative risk for the highest exposed cohorts born 1951–1962, compared to those not exposed born 1963–1970, was found to decrease with increasing age from a borderline significant relative risk (RR) of 1.7 (95 percent confidence interval, 95% CI: 1.0–3.0) for children in the age-group 7–14 years to no excess risk among those 20–24 years of age (RR: 0.9; 95% CI: 0.7–1.2). The mean age at diagnosis of thyroid cancer in the age-group 7–14 years was lowest in the birth cohorts with the highest exposure. The Poisson regression analysis showed essentially the same results, with an improved fit when adding an interaction term between age and birth-cohort to a basic model with age, gender, birth-cohort and country.Conclusion: These results are compatible with an increased risk of thyroid cancer during childhood and adolescence for subjects exposed to radioactive fallout early in life. Alternative explanations for the pattern of incidence are discussed.
Starting Page	181
Ending Page	187
Page Count	7
File Format	PDF
ISSN	09575243
Journal	Cancer Causes & Control
Volume Number	10
Issue Number	3
e-ISSN	15737225
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1999-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Public Health/Gesundheitswesen Hematology Oncology Epidemiology
Content Type	Text
Resource Type	Article
Subject	Cancer Research Oncology

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