Juutilainen J, Läärä E, Pukkala E
Department of Environmental Sciences, University of Kuopio, Finland.
Int Arch Occup Environ Health. 1990;62(4):289-93. doi: 10.1007/BF00640835.
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.
我们研究了疑似暴露于极低频（ELF）磁场（MFs）的工人中白血病、急性髓系白血病（AML）和中枢神经系统（CNS）肿瘤的相对发病率。研究人群包括1971年至1980年期间芬兰所有年龄在25至64岁之间的男性产业工人，数据来源于1970年的人口普查。根据暴露可能性，职业被分为三类暴露类别。“可能”暴露类别包括电气职业，“有可能”暴露类别包括常见使用电动机或焊接的职业。所有其他职业都归入“无暴露”类别。在将人口普查记录与国家死亡证明以及芬兰癌症登记处的档案进行关联后，得出了1971年至1980年期间不同职业组的癌症发病率。“可能”和“有可能”暴露类别中调整后的相对风险（95%置信区间）分别为：所有白血病为1.9（1.0 - 3.5）和1.4（1.1 - 1.8），AML为1.5（0.5 - 4.7）和1.4（0.9 - 2.1），CNS肿瘤为1.3（0.7 - 2.3）和1.3（1.0 - 1.6）。这些结果与早期研究一致，表明暴露于ELF磁场的工人风险增加。
