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Occupational exposure to magnetic fields in relation to male breast cancer and testicular cancer: a Swedish case-control study

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Abstract

Occupational exposure to extremely low-frequency magnetic fields (MF)was studied in 56 male subjects with breast cancer (adenocarcinoma) diagnosedin 1985-91, and 144 subjects with testicular cancer (seminoma andnon-semi-noma), diagnosed in 1985-87. The cases were compared with 1,121control subjects from a previous case-control study on MF and cancer.Exposure assessment was based on the job held longest during the decadebefore diagnosis linked to a job exposure matrix based on MF measurements.The results refer to an estimated average mean of > 0.28 μT (Q4) and> 0.40 μT (P90, part of Q4) with ≤ 0.15 μT (Q1) as reference. Forbreast cancer, the odds ratios (OR) and the 95 percent confidence intervals(CI) were 0.7 (CI = 0.3-1.9) and 0.7 (CI = 0.2-2.3), respectively. For men 60years or younger, the corresponding estimates were OR = 0.9 (CI = 0.2-4.5)and 1.5 (CI = 0.3-8.3). For testicular cancer, the ORs were 1.3 (CI =0.7-2.5) and 2.1 (CI = 1.0-4.3), and for men 40 years or younger the ORs were1.9 (CI = 0.8-4.4) and 3.9 (CI = 1.4-11.2). The results were mainlyattributable to non-seminoma, the more malignant type of testicular cancer.Our conclusion is that the results for male breast cancer, based on limitednumbers, fail to support the suggested association with MF exposure. Theresults for testicular cancer gave some support to the hypothesis of ahormonal link between MFs and cancer, and should be further explored.

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Authors and Affiliations

  1. National Institute for Working Life Solna, Sweden

    Carin Stenlund & Birgitta Floderus

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  1. Carin Stenlund
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  2. Birgitta Floderus
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Stenlund, C., Floderus, B. Occupational exposure to magnetic fields in relation to male breast cancer and testicular cancer: a Swedish case-control study. Cancer Causes Control 8, 184–191 (1997). https://doi.org/10.1023/A:1018468112964

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