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KMID : 0371020000330010125
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Journal of Preventive Medicine and Public Health
2000 Volume.33 No. 1 p.125 ~ p.133
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Relationship between Occupational Electromagnetic Field Exposure and Leukemia
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Cho Yong-Sung
Kim Yoon-Shin
Song Hae-Hiang
Hong Seung-Cheol
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Abstract
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Objectives: This study uses meta-analysis methodology to examine the statistical consistency and importance of random variation among results of epidemiologica studies of occupational electromagnetic field exposure and leukemia.
Methods: Studies for this meta-analysis were identified from previous reviews and by asking researcher active in this field for recommendations. Overall, 27 studies of occupational electromagnetic field exposures and leukemia were reviewed. A variety of meta-analysis statistical methods have been used to assess combined effects, to identify heterogeneity, and to provide a single summary risk estimate based on a set of similar epidemiologic studies. In this study, classification of exposure metrics on occupational epidemiologic studies are reported for (1) job classification (20 individual studies); (2) leukemia subtypes (13 individual studies); and (3) country (27 individual studies).
Results : Results of this study, an inverse-variance weighted pooling of all the data leads to a small but significant elevation in risk of 11% (OR=1.11, 95% CI : 1.06∼1.16) among 27 occupational epidemiologic studies. Publication bias was assessed by the ´fall-safe n´ that may be not influence for all combined results exception a few categories, ie, "power station operations" and "electric utility workers" by job classification on occupational study. And all combined odds ratio results were similar for fixed-effects models for the random-effects model in situations where there was significant heterogeneity, ie, Q-statistic significant (p<.05).
Conclusions : We found a small elevation in risk of leukemia, but the ubiquitous nature of exposure to electromagnetic fields from workplace makes even a weak association a public health issue of substantial power to influence the present overall conclusion about relationship between electromagnetic fields exposure and leukemia.
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KEYWORD
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Meta-analysis, Electromagnetic field, Leukemia, Workplace
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