Case-control study on occupational exposure to extremely low-frequency electromagnetic fields and glioma risk.
Author: Carlberg M1, Koppel T2, Ahonen M3, Hardell L1
Affiliation:
1Faculty of Medicine and Health, Department of Oncology, Örebro University, Örebro, Sweden.
2Department of Labour Environment and Safety, Tallinn University of Technology, Tallinn, Estonia.
3Department of Information Technology and Media, Mid Sweden University, Sundsvall, Sweden.
Conference/Journal: Am J Ind Med.
Date published: 2017 Apr 10
Other:
Special Notes: doi: 10.1002/ajim.22707. [Epub ahead of print] , Word Count: 153
BACKGROUND: Exposure to extremely low-frequency electromagnetic fields (ELF-EMF) was in 2002 classified as a possible human carcinogen, Group 2B, by the International Agency for Research on Cancer at WHO.
METHODS: Life time occupations were assessed in case-control studies during 1997-2003 and 2007-2009. An ELF-EMF Job-Exposure Matrix was used for associating occupations with ELF exposure (μT). Cumulative exposure (μT-years), average exposure (μT), and maximum exposed job (μT) were calculated.
RESULTS: Cumulative exposure gave for astrocytoma grade IV (glioblastoma multiforme) in the time window 1-14 years odds ratio (OR) = 1.9, 95% confidence interval (CI) = 1.4-2.6, p linear trend <0.001, and in the time window 15+ years OR = 0.9, 95%CI = 0.6-1.3, p linear trend = 0.44 in the highest exposure categories 2.75+ and 6.59+ μT years, respectively.
CONCLUSION: An increased risk in late stage (promotion/progression) of astrocytoma grade IV for occupational ELF-EMF exposure was found.
© 2017 Wiley Periodicals, Inc.
KEYWORDS: ELF-EMF; RF-EMF; astrocytoma; electromagnetic fields; glioma; occupational exposure; risk factors; wireless phones
PMID: 28394434 DOI: 10.1002/ajim.22707
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