Table 1

 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/CoOR95% CICa/CoOR95% CICa/CoOR95% 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–H6247/2181.31.04 to 1.6160/1351.41.03 to 1.861/441.61.1 to 2.5
    H1–H3167/1481.30.995 to 1.7110/961.30.9 to 1.840/311.50.9 to 2.6
    H4–H680/701.30.9 to 2.050/391.50.9 to 2.421/131.90.9 to 3.9
⩽85 h
    H1–H6134/1151.30.995 to 1.769/511.51.0 to 2.212/131.00.5 to 2.3
    H1–H388/731.40.97 to 1.948/351.50.9 to 2.47/100.80.3 to 2.0
    H4–H646/421.20.8 to 2.021/161.50.7 to 3.05/31.90.4 to 8.2
>85 h
    H1–H6113/1031.30.95 to 1.891/841.30.9 to 1.849/311.91.2 to 3.1
    H1–H379/751.20.9 to 1.862/611.20.8 to 1.833/211.91.1 to 3.5
    H4–H634/281.40.8 to 2.529/231.50.8 to 2.716/101.90.8 to 4.3
Digital
    H1–H6423/4331.00.9 to 1.366/661.10.8 to 1.6
    H1–H3303/3400.90.8 to 1.249/600.90.6 to 1.4
    H4–H6120/931.40.98 to 2.017/63.21.2 to 8.4
⩽55 h
    H1–H6230/2171.10.9 to 1.417/260.70.4 to 1.4
    H1–H3162/1671.00.8 to 1.311/230.50.3 to 1.1
    H4–H668/501.50.97 to 2.36/32.20.5 to 9.0
>55 h
    H1–H6193/2160.90.7 to 1.249/401.40.9 to 2.1
    H1–H3141/1730.90.6 to 1.138/371.10.7 to 1.9
    H4–H652/431.30.8 to 2.111/34.21.1 to 16
Cordless
    H1–H6402/3961.10.9 to 1.3164/1291.41.1 to 1.810/101.10.4 to 2.6
    H1–H3283/2971.00.8 to 1.3117/971.30.97 to 1.87/71.10.4 to 3.1
    H4–H6119/991.30.9 to 1.847/321.71.01 to 2.83/31.10.2 to 5.5
⩽183 h
    H1–H6183/2080.90.7 to 1.250/471.20.8 to 1.80/5
    H1–H3126/1530.90.7 to 1.234/351.10.7 to 1.80/4
    H4–H657/551.10.7 to 1.716/121.50.7 to 3.30/1
>183 h
    H1–H6219/1881.20.99 to 1.6114/821.51.1 to 2.110/52.10.7 to 6.3
    H1–H3157/1441.10.9 to 1.583/621.41.002 to 2.17/32.50.7 to 9.9
    H4–H662/441.61.004 to 2.531/201.80.97 to 3.43/21.60.3 to 9.9