Odds ratios and 95% confidence intervals for brain tumours for the whole study area (H1–H6), and urban (H1–H3) and rural areas (H4–H6)
| >1 year latency | >5 year latency | >10 year latency | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Ca/Co | OR | 95% CI | Ca/Co | OR | 95% CI | Ca/Co | OR | 95% CI | |
| Unconditional logistic regression analysis was used, adjusted for age, sex, and socioeconomic index. Dose-response calculation was made with median number of hours for controls as cut-off. Numbers of exposed cases (Ca) and controls (Co) are given. | |||||||||
| Analogue | |||||||||
| H1–H6 | 247/218 | 1.3 | 1.04 to 1.6 | 160/135 | 1.4 | 1.03 to 1.8 | 61/44 | 1.6 | 1.1 to 2.5 |
| H1–H3 | 167/148 | 1.3 | 0.995 to 1.7 | 110/96 | 1.3 | 0.9 to 1.8 | 40/31 | 1.5 | 0.9 to 2.6 |
| H4–H6 | 80/70 | 1.3 | 0.9 to 2.0 | 50/39 | 1.5 | 0.9 to 2.4 | 21/13 | 1.9 | 0.9 to 3.9 |
| ⩽85 h | |||||||||
| H1–H6 | 134/115 | 1.3 | 0.995 to 1.7 | 69/51 | 1.5 | 1.0 to 2.2 | 12/13 | 1.0 | 0.5 to 2.3 |
| H1–H3 | 88/73 | 1.4 | 0.97 to 1.9 | 48/35 | 1.5 | 0.9 to 2.4 | 7/10 | 0.8 | 0.3 to 2.0 |
| H4–H6 | 46/42 | 1.2 | 0.8 to 2.0 | 21/16 | 1.5 | 0.7 to 3.0 | 5/3 | 1.9 | 0.4 to 8.2 |
| >85 h | |||||||||
| H1–H6 | 113/103 | 1.3 | 0.95 to 1.8 | 91/84 | 1.3 | 0.9 to 1.8 | 49/31 | 1.9 | 1.2 to 3.1 |
| H1–H3 | 79/75 | 1.2 | 0.9 to 1.8 | 62/61 | 1.2 | 0.8 to 1.8 | 33/21 | 1.9 | 1.1 to 3.5 |
| H4–H6 | 34/28 | 1.4 | 0.8 to 2.5 | 29/23 | 1.5 | 0.8 to 2.7 | 16/10 | 1.9 | 0.8 to 4.3 |
| Digital | |||||||||
| H1–H6 | 423/433 | 1.0 | 0.9 to 1.3 | 66/66 | 1.1 | 0.8 to 1.6 | – | – | – |
| H1–H3 | 303/340 | 0.9 | 0.8 to 1.2 | 49/60 | 0.9 | 0.6 to 1.4 | – | – | – |
| H4–H6 | 120/93 | 1.4 | 0.98 to 2.0 | 17/6 | 3.2 | 1.2 to 8.4 | – | – | – |
| ⩽55 h | |||||||||
| H1–H6 | 230/217 | 1.1 | 0.9 to 1.4 | 17/26 | 0.7 | 0.4 to 1.4 | – | – | – |
| H1–H3 | 162/167 | 1.0 | 0.8 to 1.3 | 11/23 | 0.5 | 0.3 to 1.1 | – | – | – |
| H4–H6 | 68/50 | 1.5 | 0.97 to 2.3 | 6/3 | 2.2 | 0.5 to 9.0 | – | – | – |
| >55 h | |||||||||
| H1–H6 | 193/216 | 0.9 | 0.7 to 1.2 | 49/40 | 1.4 | 0.9 to 2.1 | – | – | – |
| H1–H3 | 141/173 | 0.9 | 0.6 to 1.1 | 38/37 | 1.1 | 0.7 to 1.9 | – | – | – |
| H4–H6 | 52/43 | 1.3 | 0.8 to 2.1 | 11/3 | 4.2 | 1.1 to 16 | – | – | – |
| Cordless | |||||||||
| H1–H6 | 402/396 | 1.1 | 0.9 to 1.3 | 164/129 | 1.4 | 1.1 to 1.8 | 10/10 | 1.1 | 0.4 to 2.6 |
| H1–H3 | 283/297 | 1.0 | 0.8 to 1.3 | 117/97 | 1.3 | 0.97 to 1.8 | 7/7 | 1.1 | 0.4 to 3.1 |
| H4–H6 | 119/99 | 1.3 | 0.9 to 1.8 | 47/32 | 1.7 | 1.01 to 2.8 | 3/3 | 1.1 | 0.2 to 5.5 |
| ⩽183 h | |||||||||
| H1–H6 | 183/208 | 0.9 | 0.7 to 1.2 | 50/47 | 1.2 | 0.8 to 1.8 | 0/5 | – | – |
| H1–H3 | 126/153 | 0.9 | 0.7 to 1.2 | 34/35 | 1.1 | 0.7 to 1.8 | 0/4 | – | – |
| H4–H6 | 57/55 | 1.1 | 0.7 to 1.7 | 16/12 | 1.5 | 0.7 to 3.3 | 0/1 | – | – |
| >183 h | |||||||||
| H1–H6 | 219/188 | 1.2 | 0.99 to 1.6 | 114/82 | 1.5 | 1.1 to 2.1 | 10/5 | 2.1 | 0.7 to 6.3 |
| H1–H3 | 157/144 | 1.1 | 0.9 to 1.5 | 83/62 | 1.4 | 1.002 to 2.1 | 7/3 | 2.5 | 0.7 to 9.9 |
| H4–H6 | 62/44 | 1.6 | 1.004 to 2.5 | 31/20 | 1.8 | 0.97 to 3.4 | 3/2 | 1.6 | 0.3 to 9.9 |