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CISDOC database

Document ID (ISN)74994
CIS number 00-833
ISSN - Serial title 1351-0711 - Occupational and Environmental Medicine
Year 1999
Convention or series no.
Author(s) Kheifets L.I., Gilbert E.S., Sussman S.S., GuÚnel P., Sahl J.D., Savitz D.A., ThÚriault G.
Title Comparative analyses of the studies of magnetic fields and cancer in electric utility workers: Studies from France, Canada and the United States
Bibliographic information Aug. 1999, Vol.56, No.8, p.567-574. Illus. 19 ref.
Abstract To summarize and facilitate comparison of three major studies of electric utility workers that examined the relation between exposure to magnetic fields and risk of brain cancer and leukaemia, a common analytical approach was applied to the data of the three studies. A nested case-control design with conditional logistic regression was used to estimate the relative risk/10 microtesla-years (ÁT-years) for each of the contributing cohorts and for the combined data. Apparent inconsistencies in the findings of these studies can be explained by statistical variation. Overall, the studies suggest a small increase in risk of both brain cancer and leukaemia. Different methodological choices had little impact on the results. Based on a combined analysis of data from ail five studies, the relative risk/10 ÁT-years was 1.12 for brain cancer, and 1.09 for leukaemia, neither of which was significant at the 95% confidence interval (CI) level. The combined estimates seem to provide the best summary measures of the data from all studies. However, fluctuations in risks among studies may reflect real differences, and the exposure measurements in different studies may not be entirely comparable.
Descriptors (primary) leukaemia; electromagnetic fields; brain cancer; magnetic fields; electric power generation; electrical industry; cancer
Descriptors (secondary) Canada; USA; epidemiological aspects; France; electric fields; mortality; comparative analysis; epidemiologic study; case-control study; cohort study; long-term exposure; personnel monitoring; statistical evaluation; exposure evaluation
Document type D - Periodical articles
Country / State or ProvinceCanada; France; USA
Subject(s) Radiation
Broad subject area(s) Physical hazards
Browse category(ies) Leukaemia
Diseases of the nervous system
Manufacturing of electrical appliances and equipment
Power generation and distribution
Electromagnetic fields