Relative risks of mortality from acute myeloid leukaemia and chronic myeloid leukaemia by levels of estimated cumulative magnetic field exposure in subcohort with work histories (n = 79 972) (four separate analyses): study of United Kingdom electricity generation and transmission workers, 1973–97
| Cumulative magnetic field exposure (μT.y)7-150 | n | RR7-151 | (95% CI) | RR7-152 | (95% CI) |
| Acute myeloid leukaemia7-153: | |||||
| 0–2.4 | 25 | 1.0 | 1.0 | ||
| 2.5–4.9 | 7 | 1.49 | (0.64 to 3.48) | 1.51 | (0.64 to 3.62) |
| 5.0–9.9 | 8 | 1.06 | (0.47 to 2.40) | 1.02 | (0.43 to 2.43) |
| 10.0–19.9 | 6 | 0.92 | (0.37 to 2.30) | 0.84 | (0.32 to 2.20) |
| ⩾20.0 | 3 | 1.20 | (0.36 to 4.04) | 1.16 | (0.33 to 4.02) |
| p Value for trend7-154 | p>0.50 and >0.50 | p>0.50 and >0.50 | |||
| Chronic myeloid leukaemia7-160: | |||||
| 0–2.4 | 9 | 1.0 | 1.0 | ||
| 2.5–4.9 | 4 | 2.12 | (0.65 to 6.93) | 1.60 | (0.47 to 5.38) |
| 5.0–9.9 | 4 | 1.27 | (0.38 to 4.21) | 0.97 | (0.28 to 3.38) |
| 10.0–19.9 | 2 | 0.72 | (0.15 to 3.42) | 0.63 | (0.13 to 3.16) |
| ⩾20.0 | 1 | 0.96 | (0.12 to 7.72) | 0.81 | (0.10 to 6.76) |
| p Value for trend7-154 | p>0.50 and >0.50 | p>0.50 and >0.50 | |||
↵7-151 Analysed simultaneously with sex and attained age.
↵7-152 Analysed simultaneously with sex, age, calendar period, year of starting employment, and negotiating body. For levels, see table 4.
↵7-153 Any part of death certificate coded to ICD-9 205.0.
↵7-154 See footnote ††table 6.
↵7-160 Any part of death certificate coded to ICD-9 205.1.