Table 4 Odds ratios for childhood leukaemia by distance to closest overhead power line of 200 kV or higher within subgroups
From: Proximity to overhead power lines and childhood leukaemia: an international pooled analysis
Subgroup | Cases | Controls | OR | 95% CI |
|---|---|---|---|---|
Leukaemia subtypea | ||||
Acute lymphoblastic leukaemia | ||||
Distance (m) | ||||
≥ 300 | 21,068 | 56,450 | 1 | – |
150 to < 300 | 240 | 785 | 0.99 | 0.84–1.17 |
50 to < 150 | 120 | 418 | 0.96 | 0.77–1.21 |
< 50 | 40 | 108 | 1.39 | 0.92–2.10 |
Acute myeloid leukaemia | ||||
Distance (m) | ||||
≥ 300 | 3,916 | 33,986 | 1 | – |
150 to < 300 | 48 | 484 | 1.02 | 0.71–1.48 |
50 to < 150 | 18 | 251 | 0.91 | 0.50–1.63 |
< 50 | 5 | 68 | 0.82 | 0.27–2.45 |
Age at diagnosis | ||||
< 5 Years | ||||
Distance (m) | ||||
≥ 300 | 14,940 | 29,322 | 1 | – |
150 to < 300 | 188 | 396 | 1.14 | 0.94–1.38 |
50 to < 150 | 88 | 228 | 0.9 | 0.69–1.17 |
< 50 | 34 | 49 | 1.65 | 1.02–2.67 |
≥ 5 Years | ||||
Distance (m) | ||||
≥ 300 | 11,683 | 34,418 | 1 | – |
150 to < 300 | 115 | 502 | 0.78 | 0.62–0.98 |
50 to < 150 | 64 | 241 | 1.09 | 0.80–1.49 |
< 50 | 16 | 74 | 1.01 | 0.55–1.83 |
Year of diagnosis | ||||
1960–1980 | ||||
Distance (m) | ||||
≥ 300 | 5,213 | 5,933 | 1 | – |
150 to < 300 | 40 | 62 | 1.71 | 1.03–2.83 |
50 to < 150 | 23 | 32 | 2.68 | 1.34–5.37 |
< 50 | 8 | 12 | 2.22 | 0.78–6.33 |
1980–2000 | ||||
Distance (m) | ||||
≥ 300 | 11,200 | 13,992 | 1 | – |
150 to < 300 | 110 | 176 | 0.89 | 0.69–1.15 |
50 to < 150 | 65 | 99 | 1.04 | 0.75–1.45 |
< 50 | 14 | 22 | 1.07 | 0.52–2.18 |
2000–2010 | ||||
Distance (m) | ||||
≥ 300 | 10,210 | 43,815 | 1 | – |
150 to <300 | 153 | 660 | 0.99 | 0.82–1.21 |
50 to <150 | 64 | 338 | 0.81 | 0.61–1.09 |
< 50 | 28 | 89 | 1.44 | 0.90–2.32 |
