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Leukemia & Lymphoma

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Do Power Cables and Household Wiring Cause Cancer?

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WebMD Health News

Dec. 2, 1999 (Minneapolis) -- Power cables and household wiring pose no increased risk of leukemia or other childhood cancers, according to British epidemiologists who reported their findings in two separate studies in the Dec. 2 issue of the journal The Lancet. These findings are similar to those of studies conducted in the U.S., even though they refute suggestions that have been highly publicized in mainstream media.

In studies that took place in the United Kingdom (U.K.) and New Zealand, no link was found between typical levels of electromagnetic radiation and childhood cancer. This study provides no evidence that exposure to electromagnetic fields (EMF) associated with the electricity supply in the U.K. increases risks for a variety of cancers, write the authors of the U.K. Childhood Cancer Study. These include various forms of childhood leukemia, cancers of the brain and spinal cord, and other childhood cancers.

"Physicians and biomedical scientists have always had a problem with the proposed association between electromagnetic fields and childhood cancer, because there's no biologic mechanism," author Nick Day, PhD, tells WebMD. He says that mainstream media coverage of smaller studies showing a link has given rise to public concern that there may be a link between electromagnetic fields and cancer. "Our study concurs with [others] showing that the normal levels of exposure don't pose a risk." He is a professor of epidemiology at Cambridge University in England.

In this study, researchers compared the records of over 3,800 pediatric cases of cancer and over 7,600 healthy subjects. When children with mean EMF exposures of more than 0.2 microteslas (mcT) were compared with those with mean exposures of less than 0.1 mcT, there was no significant difference in the number of cases of leukemia, brain tumors, or other forms of cancers. Microteslas are units that measure electromagnetic field exposure.

The study conducted in New Zealand revealed similar results. "The analyses of ... 113 matched pairs ... showed no association [of childhood leukemia] with magnetic field exposure," write John D. Dockerty, PhD, and colleagues, in a research letter about findings in New Zealand. Dockerty is a Nuffield Medical Fellow at Oxford University in Oxford, England.

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