Study type:
Epidemiological study
(observational study)
Time trends in brain tumor incidence rates in Denmark, Finland, Norway, and Sweden, 1974-2003
epidem.
By:
Deltour I, Johansen C, Auvinen A, Feychting M, Klaeboe L, Schüz J
Published in: J Natl Cancer Inst 2009; 101 (24): 1721-1724
Aim of study (acc. to author)
Further details
Mobile phone use in the Nordic countries started in the mid-1980s and increased sharply in the mid-1990s.
Endpoint/type of risk estimation
Type of risk estimation:
(standardized incidence rate (SIR))
Exposure
Population
-
Group:
-
Age:
20–79 years
-
Characteristics:
primary brain tumors
-
Observation period:
1974 - 2003
-
Study location:
Denmark, Finland, Norway, and Sweden
-
Data source:
cancer registries of Denmark, Finland, Norway, and Sweden
Study size
Statistical analysis method:
Results (acc. to author)
From 1974 to 2003, the brain tumor incidence rates in Denmark, Finland, Norway, and Sweden were stable, decreased, or continued a gradual increase that started before the introduction of mobile phones. No change in incidence trends was found in the time period of 1998 to 2003, the time when possible associations between mobile phone use and brain tumor risk would be informative about an induction period of 5 to 10 years.
The authors concluded that the lack of a detectable trend change in incidence up to 2003 suggests that the induction period for brain tumors associated with mobile phone use exceeds 5 to 10 years, the increased risk for brain tumors in association with mobile phones use in this population is too small to be observed, the increased risk is restricted to subgroups of brain tumors or mobile phone users, or there is no increased risk for brain tumors associated with mobile phone use.
Study funded by
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Danish Strategic Research Council, Denmark
Comments on this article
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Dore JF et al.
(2010):
Re: Time trends in brain tumor incidence rates in Denmark, Finland, Norway, and Sweden, 1974-2003
-
Hardell L et al.
(2010):
Re: Time trends in brain tumor incidence rates in Denmark, Finland, Norway, and Sweden, 1974-2003
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