作者对可能接触超低频磁场工人中的白血病、急性骨髓白血病和中枢神经系统肿瘤的发病情况作了调查分析。对象为25—64岁男性工人,以职业情况分为3组,即“可定”接触组,包括从事电的这类工人;“可能”接触组包括操作电动机、电焊机的这类工人;除此之外为非接触组,资料来自死亡证书和国家癌症登记挡案。分析结果为:“可定”接触和“可能”接触组白血病发病的危险度分别为1.9(95％可信限1.0～3.5)、1.4(1.1～1.8), The authors investigated the incidence of leukemia, acute myeloid leukemia and central nervous system tumors in workers exposed to ultra-low frequency magnetic fields. The target group is male workers aged 25-64 years. They are divided into three groups according to occupational conditions, namely, the “potential” contact group, which includes such workers engaged in electricity; the “potential” contact group includes such workers who operate electric motors and welding machines; This is a non-contact group, data from the death certificate and national cancer registration file. The analysis showed that the risk of developing leukemia was “1.9” (95% CI, 1.0-3.5), 1.4 (1.1-1.8), "