Table 1 Adjusted relative risks for leukaemia, brain cancer and breast cancer among 22335 men and 5774 women who had been employed for at least 3 months at a utility company in Denmark between 1900 and 1993, including incident cases of cancer diagnosed from 1 April 1968 to 31 December 2002, by average estimated level of exposure to electromagnetic fields at work
Cancer (No of cases)Background exposure (0.09 T)Medium exposure (0.10.99 T)High exposure (1.0 T)
Person-years128936343140170032
Leukaemia
Men (70)1.00.97 (0.51 to 1.85)1.04 (0.53 to 2.04)
Brain tumours
Men (85)1.00.80 (0.47 to 1.37)0.69 (0.38 to 1.25)
Women (25)1.01.37 (0.51 to 3.69)No cases
Breast cancer
Women (188)1.00.77 (0.56 to 1.07)1.04 (0.32 to 3.34)

  • Results are shown as RR (95 CI).

  • Relative risks from a Poisson regression model with the variables occupational exposure to electromagnetic fields, age, duration of employment and calendar year as covariates.