Table 9
Relative risks of mortality from acute myeloid leukaemia and chronic myeloid leukaemia by levels of estimated magnetic field exposure received in preceding 5 years in subcohort with work histories (n = 79 972) (four separate analyses): study of United Kingdom electricity generation and transmission workers, 1973–94
| Magnetic field exposure received in preceding 5 years (μT.y)9-150 | n | RR9-151 | (95% CI) | RR9-152 | (95% CI) |
| Acute myeloid leukaemia9-153: | |||||
| Zero | 28 | 1.0 | 1.0 | ||
| 0.01–0.49 | 5 | 1.14 | (0.47 to 2.74) | 1.14 | (0.47 to 2.78) |
| 0.5–1.99 | 3 | 0.90 | (0.27 to 3.02) | 0.98 | (0.29 to 3.34) |
| 2.0–4.99 | 2 | 0.86 | (0.20 to 3.69) | 0.96 | (0.22 to 4.18) |
| ⩾5.0 | 1 | 0.83 | (0.11 to 6.20) | 0.93 | (0.12 to 7.05) |
| p Value for trend9-154 | p>0.50 and >0.50 | p>0.50 and >0.50 | |||
| Chronic myeloid leukaemia9-160: | |||||
| Zero | 11 | 1.0 | 1.0 | ||
| 0.01–0.49 | 2 | 0.92 | (0.21 to 4.10) | 0.73 | (0.16 to 3.31) |
| 0.5–1.99 | 1 | 0.75 | (0.09 to 5.89) | 0.56 | (0.07 to 4.52) |
| 2.0–4.99 | 1 | 1.13 | (0.14 to 8.99 | 0.84 | (0.10 to 6.74) |
| ⩾5.0 | 1 | 2.29 | (0.28 to 18.46) | 1.40 | (0.17 to 11.49) |
| p Value for trend9-154 | p>0.50 and =0.44 | p>0.50 and >0.50 | |||
