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Extremely low frequency magnetic fields and brain tumour    
Ga naar overzicht berichten in: Onderzoeken

Extremely low frequency magnetic fields and brain tumour
donderdag, 30 januari 2014 - Dossier: Algemeen


Bron: cebp.aacrjournals.org/content/early/2014/06/14/1055-9965.EPI-14-0102.abstract
4 juni 2014

Occupational exposure to extremely low frequency magnetic fields and brain tumour risks in the INTEROCC study


Michelle C. Turner1,*, Geza Benke2, Joseph D. Bowman3, Jordi Figuerola4, Sarah Fleming5, Martine Hours6, Laurel Kincl7, Daniel Krewski8, Dave McLean9, Marie-Elise Parent10, Lesley Richardson11, Siegal Sadetzki12, Klaus Schlaefer13, Brigitte Schlehofer13, Joachim Schuz14, Jack Siemiatycki15, Martie Van Tongeren16, and Elisabeth Cardis4
+ Author Affiliations

1Parc de Recerca Biomèdica de Barcelona, Doctor Aiguader, 88, Centre for Research in Environmental Epidemiology
2Monash University
3National Institute for Occupational Safety and Health
4Centre for Research in Environmental Epidemiology
5University of Leeds
6Unité Mixte de Recherche Epidémiologique Transport Travail Environnement Université Lyon 1/IFSTTAR
7Oregon State University
8McLaughlin Centre for Population Health Risk Assessment, University of Ottawa
9Massey University
10INRS-Institut Armand-Frappier, University of Quebec
11Hospital Research Centre, University of Montreal
12The Cancer & Radiation Epidemiology Unit, The Gertner Institute
13Unit of Environmental Epidemiology, German Cancer Research Center
14Section of Environment and Radiation, International Agency for Research on Cancer (IARC)
15Hospital Research Center, University of Montreal
16Exposure Assessment, Institute of Occupational Medicine

↵* Corresponding Author:
Michelle C. Turner, Parc de Recerca Biomèdica de Barcelona, Doctor Aiguader, 88, Centre for Research in Environmental Epidemiology, Barcelona, 08003, Spain mturner@creal.cat

Abstract

Background: Occupational exposure to extremely low frequency magnetic fields (ELF) is a suspected risk factor for brain tumours, however the literature is inconsistent. Few studies have assessed whether ELF in different time windows of exposure may be associated with specific histologic types of brain tumours. This study examines the association between ELF and brain tumours in the large-scale INTEROCC study. Methods: Cases of adult primary glioma and meningioma were recruited in seven countries (Australia, Canada, France, Germany, Israel, New Zealand, United Kingdom) between 2000 and 2004. Estimates of mean workday ELF exposure based on a job exposure matrix assigned. Estimates of cumulative exposure, average exposure, maximum exposure, and exposure duration were calculated for the lifetime, and 1-4, 5-9, and 10+ years prior to the diagnosis/reference date. Results: There were 3,761 included brain tumour cases (1,939 glioma, 1,822 meningioma) and 5,404 population controls. There was no association between lifetime cumulative ELF exposure and glioma or meningioma risk. However, there were positive associations between cumulative ELF 1-4 years prior to the diagnosis/reference date and glioma (odds ratio (OR) ≥ 90th percentile vs < 25th percentile = 1.67, 95% confidence interval (CI) 1.36-2.07, p < 0.0001 linear trend), and, somewhat weaker associations with meningioma (OR ≥ 90th percentile vs < 25th percentile = 1.23, 95% CI 0.97-1.57, p = 0.02 linear trend). Conclusions: Results showed positive associations between ELF in the recent past and glioma. Impact: Occupational ELF exposure may play a role in the later stages (promotion and progression) of brain tumourigenesis.

Received January 30, 2014.
Revision received June 2, 2014.
Accepted June 4, 2014.
Copyright © 2014, American Association for Cancer Research.


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