Table 4. Relative risk estimates (95% confidence interval) by magnetic-field category, and with magnetic-field exposure as a continuous variable.
|
Categorical analysis. Reference level: < 0.1 μT
|
||||
|---|---|---|---|---|
|
Magnetic field (μT)
|
Continuous analysis | |||
| Diagnostic group | 0.1 to <0.2 | 0.2 to <0.4 | ⩾0.4 | RR per 0.2 μT |
| Leukaemias | 2.00 (0.50–7.99) | 0 case/ 2 controls | 2.00 (0.18–22.04) | 1.14 (0.57–2.32) |
| CNS/brain tumours | 0.50 (0.09–2.73) | 1 case/ 0 control | 0.33 (0.03–3.20) | 0.80 (0.43–1.51) |
| Other cancers | 0.33 (0.07–1.65) | 1.00 (0.14–7.10) | 5.00 (0.58–42.80) | 1.34 (0.84–2.15) |
Abbreviation: RR=relative risk.