Cases (n = 280) | Controls (n = 285) | OR | (95% CI) | |||
---|---|---|---|---|---|---|
No. | % | No. | % | |||
Exposure duration to neighbouring petrol station or repair garage | ||||||
0 | 257 | 91.8 | 268 | 94.0 | 1.0 | (ref.) |
1–35 months | 8 | 2.9 | 4 | 1.4 | 3.4 | (0.9 to 12.4) |
⩾36 months | 9 | 3.2 | 3 | 1.1 | 4.7 | (1.2 to 18.5) |
Missing values | 6 | 2.1 | 10 | 3.5 | ||
OR per month of exposure | 1.03 | (1.01 to 1.05) | ||||
(p trend <0.05) |