Table 3 One-stage and two-stage results for childhood leukaemia comparing < 50 m with 300 + m distance with closest overhead power line
From: Proximity to overhead power lines and childhood leukaemia: an international pooled analysis
Any voltage | 200 + kV | |||
|---|---|---|---|---|
Study | Ca/Co | OR (95% CI) | Ca/Co | OR (95% CI) |
Included | ||||
Brazil | 5/11 | 1.64 (0.54–4.95) | 3/1 | 9.05 (0.89–91.90) |
Denmark | 0/2 | – | 0/0 | – |
France | 23/213 | 1.17 (0.75–1.81) | 9/60 | 1.62 (0.80–3.30) |
Italy1 | 2/2 | 4.27 (0.57–31.91) | 0/0 | – |
Italy2 | 1/4 | 1.00 (0.10–9.63) | 0/0 | – |
Norway | 8/43 | 0.70 (0.31–1.56) | 0/6 | – |
Sweden | 4/8 | 2.72 (0.45–16.57) | 4/8 | 2.72 (0.45–16.57) |
Switzerland | 34/199 | 0.88 (0.61–1.28) | 5/20 | 1.34 (0.50–3.59) |
Tasmania | 1/0 | – | 0/0 | – |
United Kingdom | 22/34 | 0.82 (0.49–1.40) | 6/13 | 0.56 (0.21–1.47) |
United States | 97/89 | 1.07 (0.80–1.43) | 23/15 | 1.50 (0.78–2.88) |
Two-stage (meta-analysis) | 1.02 (0.85–1.22) | 1.41 (0.88–2.24) | ||
One-stage (pooled analysis) | 1.01 (0.85–1.21) | 1.33 (0.92–1.93) | ||
Not included | ||||
Japan | 3.06 (1.31–7.13) | – | ||
Finland | 1.47 (0.33–6.57) | – | ||
Meta-analysis of all studies | 1.10 (0.88–1.38) | – | ||
