Occupational exposure to extremely low-frequency magnetic fields (ELF-MF) and postmenopausal breast cancer risk
Menée à partir de données canadiennes 2008-2011 portant sur 592 témoins et 663 patientes atteintes d'un cancer du sein, cette étude analyse l'association entre une exposition professionnelle aux champs magnétiques de très basse fréquence et le risque de développer la maladie après la ménopause
Objective: Estimate the association between occupational exposures to extremely low-frequency magnetic fields (ELF-MF) and postmenopausal breast cancer.
Methods: Lifetime job histories from a population-based case-control study (2008-2011) of histologically-confirmed breast cancer in Montréal, Canada were linked to a job-exposure matrix to assign geometric mean ELF-MF exposure/workday. Logistic regression estimated odds ratios (OR) and 95% confidence intervals (CI) for cumulative, average, maximum, and duration of maximum exposure to ELF-MF (per interquartile range increase), adjusting for individual-level and ecological covariables.
Results: Data from 663 cases and 592 controls revealed no association between occupational ELF-MF exposure and postmenopausal breast cancer, though restricting exposures to 0-10 years before interview and to those during breast development, some positive associations was observed, particularly for ER+/PR+ tumours.
Conclusions: Our findings suggest no association between occupational ELF-MF exposure and postmenopausal breast cancer risk.
Journal of Occupational and Environmental Medicine , résumé, 2025