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  • Title: Overview of epidemiologic research on electric and magnetic fields and cancer.
    Author: Savitz DA.
    Journal: Am Ind Hyg Assoc J; 1993 Apr; 54(4):197-204. PubMed ID: 8480635.
    Abstract:
    This overview of epidemiologic research addresses the potential role of 60 Hertz electric and magnetic fields (EMF) in the etiology of cancer. The key findings are summarized with notation of the methodological challenges with which investigators must content. Although exposure is ubiquitous, long-term average EMF is influenced primarily by the background levels in homes, use of selected electric appliances such as electric blankets, and workplace exposures to energized equipment. Studies of residential exposure have focused on childhood cancer, starting with the report of an excess of wire configurations associated with elevated magnetic fields near the homes of children who developed cancer compared to healthy children. Several subsequent studies have tended to confirm that association, although the evidence falls short of demonstrating a causal association between magnetic fields and cancer. Exposures from electric appliances have been less extensively pursued, with some suggestions of an association with childhood cancer. A more extensive literature has evaluated the association between workplace exposure to EMF, based on job titles of "electrical workers" and cancer. Across many different study designs and settings, certain groups of electrical workers show elevated occurrence of leukemia and brain cancer. The consistency of findings is notable, but the key question is whether the association with job title is due to EMF or some other agent in the workplace. Future research would benefit from specification of testable challenges to a causal association between EMF exposure in the home or workplace and cancer, along with continued efforts to improve our understanding and measurement of EMF exposure.
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