Summary
The relative incidence of leukaemia, acute myeloid leukaemia (AML) and central nervous system (CNS) tumours among workers presumably exposed to extremely low frequency (ELF) magnetic fields (MFs) was studied. The study population consisted of all male industrial workers in Finland aged 25 to 64 years during 1971–1980 according to the Population Census in 1970. The occupations were grouped into three exposure categories according to the probability of exposure. The category of “probable” exposure included electrical occupations and the category of “possible” exposure included occupations where electric motors or welding are common. All other occupations were included to the category of “no exposure”. Cancer incidence rates in different occupational groups during 1971–1980 were obtained after linking the census records with the national death certificates and the files of the Finnish Cancer Registry. The adjusted relative risks (with 95% confidence limits) in the categories of “probable” and “possible” exposure were for all leukaemia 1.9 (1.0–3.5) and 1.4 (1.1–1.8), for AML 1.5 (0.5–4.7) and 1.4 (0.9–2.1), and for CNS tumours 1.3 (0.7–2.3) and 1.3 (1.0–1.6), respectively. The results are concordant with earlier studies suggesting elevated risk among workers exposed to ELF magnetic fields.
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Akamine T, Muramatsu H, Hamada H, Sakou T (1985) Effects of pulsed electromagnetic fields on growth and differentiation of embryonal carcinoma cells. J Cell Physiol 124:247–254
Breslow NE, Day NE (1987) Statistical methods in cancer research, Vol II. The design and analysis of cohort studies. IARC Scientific Publications No. 62. International Acency for Research on Cancer, Lyon
Central Statistical Office of Finland (1974) Suomen Virallinen Tilasto VI C:104:9. Väestölaskenta 1970 (Population Census 1970). 9: Ammatti ja Sosiaaliasema (Occupational and Civil Social Position). Tilastokeskus, Helsinki 1974
Coleman M, Beral V (1988) A review of epidemiological studies of the health effects of living near or working with electricity generation and transmission equipment. Int J Epidemiol 17:1–13
Easterly CE (1981) Cancer link magnetic field exposure: A hypothesis. Am J Epidemiol 114:169–174
Flodin U, Persson B, Hardell L (1986) Background radiation, electrical work, and some other exposures associated with acute myeloid leukemia in a case-referent study. Arch Environ Health 14:77–84
Juutilainen J, Harri M, Saali K, Lahtinen T (1986) Effects of 100-Hz magnetic fields with various waveforms on the development of chick embryos. Radiat Environ Biophys 25:65–74
Juutilainen J, Läärä E, Saali K (1987) Relationship between field strength and abnormal development in chick embryos exposed to 50 Hz magnetic fields. Int J Radiat Biol 52:787–793
Kavet RI, Banks RS (1986) Emerging issues in extremely-low-frequency electric and magnetic field health research. Environ Res 39:386–404
Lin RS, Dischinger PC, Conde J, Farrel KP (1985) Occupational exposure to electromagnetic fields and the occurrence of brain tumors. J Occup Med 27:413–419
Phillips JL, Rutledge L, Winters WD (1986a) Transferrin binding to two human colon carcinoma cell lines: characterization and effect of 60-Hz electromagnetic fields. Cancer ReEs 46:239–244
Phillips JL, Winters WD, Rutledge L (1986b) In vitro exposure to electromagnetic fields: changes in tumour cell properties. Int J Radiat Biol 49:463–469
Rimpelä A, Pukkala E (1984) Socioeconimic status, education and the incidence of cancer. J Soc Med (Tampere) 21:61–75 (in Finnish, with English summary)
Savitz DA, Calle EE (1987) Leukemia and occupational exposure to electromagnetic fields: review of epidemiologic surveys. J Occup Med 29:47–51
Savitz DA, Wachtel H, Barnes FA, John EM, Tvrdik JG (1988) Case-control study of childhood cancer and exposure to 60-Hz magnetic fields. Am J Epidemiol 128:21–38
Sheikh K (1986) Exposure to electromagnetic fields and the risk of leukemia. Arch Environ Health 41:56–63
Speers MA, Dobbins JG, Miller VS (1988) Occupational exposures and brain cancer mortality: a preliminary study of East Texas residents. Am J Ind Med 13:629–638
Teppo L, Pukkala E, Hakama M, Hakulinen T, Herva A, Saxén E (1980) Way of life and cancer incidence in Finland. A municipality-based ecological analysis. Scand J Soc Med [Suppl 19]
Thomas TL, Stolley PD, Stemhagen A, Fontham ETH, Bleecker ML, Stewart PA, Hoover RN (1987) Brain tumor mortality risk among men with electrical and electronics jobs: a casecontrol study. JNCI 79:233–238
Tomenius L (1986) 50-Hz electromagnetic environment and the incidence of childhood tumors in Stockholm county. Bioelectromagnetics 7:191–207
Wertheimer N, Leeper E (1979) Electrical wiring configurations and childhood cancer. Am J Epidemiol 109:273–284
Wertheimer N, Leeper E (1982) Adult cancer related to electrical wires near the home. Int J Epidemiol 11:345–355
WHO (1984) Extremely low frequency (ELF) fields. Environmental health criteria 35. World health Organization, Geneva
WHO (1987) Magnetic fields. Environmental Health Criteria 69. World Health Organization, Geneva
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Juutilainen, J., Läärä, E. & Pukkala, E. Incidence of leukaemia and brain tumours in Finnish workers exposed to ELF magnetic fields. Int. Arch Occup Environ Heath 62, 289–293 (1990). https://doi.org/10.1007/BF00640835
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DOI: https://doi.org/10.1007/BF00640835