Lung cancer risk in concentric areas at different distances from the industrial sources: frequency distribution of cases and controls, adjusted odds ratios (OR) and 95% confidence intervals (CI)
| Distance from source (km) | Cases (n = 234) | Controls (n = 729) | All | |||
|---|---|---|---|---|---|---|
| n | % | n | % | OR* | 95% CI | |
| *Odds ratios adjusted for sex, age, year of death, smoking habits, education level, and exposure to occupations increasing risk for lung cancer according to the International Agency for Research on Cancer (IARC)2. | ||||||
| Harbour | ||||||
| <0.7 | 85 | 36.3 | 282 | 38.7 | 1.00 | |
| 0.7 to 1.3 | 79 | 33.8 | 249 | 34.2 | 1.12 | 0.77 to 1.61 |
| >1.3 | 70 | 29.9 | 198 | 27.1 | 1.31 | 0.86 to 1.86 |
| Cement factory | ||||||
| <0.6 | 29 | 12.4 | 142 | 19.5 | 1.00 | |
| 0.6 to 1.2 | 93 | 39.7 | 282 | 38.7 | 1.61 | 0.99 to 2.62 |
| >1.2 | 112 | 47.9 | 305 | 41.8 | 1.81 | 1.13 to 2.92 |
| Fiumaretta power plant | ||||||
| <1 | 11 | 4.7 | 44 | 6.0 | 1.00 | |
| 1 to 2 | 115 | 49.1 | 399 | 54.7 | 1.18 | 0.58 to 2.44 |
| >2 | 112 | 46.2 | 286 | 39.3 | 1.60 | 0.78 to 3.29 |
| Tor Valdaliga power plants | ||||||
| <4 | 12 | 5.1 | 22 | 3.0 | 1.00 | |
| 4 to 6 | 170 | 72.7 | 582 | 79.8 | 0.56 | 0.26 to 1.21 |
| >6 | 52 | 22.2 | 125 | 17.2 | 0.85 | 0.38 to 1.92 |