Distribution of residential exposure to heavy industry in cases and controls
| None n (%) | 1–25 years n (%) | >25 years n (%) | Median (IQR) years | |
|---|---|---|---|---|
| Years in zone A | ||||
| Cases (n = 204) | 58 (28.4) | 58 (28.4) | 88 (43.1) | 20 (0–41) |
| Controls (n = 339) | 126 (37.2) | 130 (38.4) | 83 (24.5) | 11 (0–25) |
| Years in zone A or D | ||||
| Cases (n = 204) | 45 (22.1) | 60 (29.4) | 99 (48.5) | 24 (4.5–42) |
| Controls (n = 339) | 86 (25.4) | 156 (46.0) | 97 (28.6) | 16 (0–29) |