Observed (Obs) and expected (Exp) numbers of cases of different types of cancer and standardised incidence ratio (SIR) among 1790 male aluminium smelter workers in the follow up period 1953–95 (36 587 person-years)
| Cancer site | ICD-7 codes | Obs | Exp | SIR | 95% CI |
| All sites | 140–204 | 286 | 278.5 | 1.0 | 0.9 to 1.2 |
| Upper respiratory organs | 141, 143–8, 161 | 8 | 7.6 | 1.1 | 0.5 to 2.1 |
| Lip | 140 | 1 | 4.0 | 0.3 | 0.0 to 1.4 |
| Oesophagus | 150 | 1 | 3.7 | 0.3 | 0.0 to 1.5 |
| Stomach | 151 | 26 | 30.0 | 0.9 | 0.6 to 1.3 |
| Colon | 153 | 31 | 22.3 | 1.4 | 0.9 to 2.0 |
| Rectum | 154 | 20 | 14.2 | 1.4 | 0.9 to 2.2 |
| Liver | 155.0 | 4 | 1.9 | 2.2 | 0.6 to 5.5 |
| Pancreas | 157 | 6 | 10.4 | 0.6 | 0.2 to 1.3 |
| Nose and sinuses | 160 | 2 | 0.9 | 2.2 | 0.3 to 8.0 |
| Lung | 162 | 27 | 30.6 | 0.9 | 0.6 to 1.3 |
| Pleura | 163 | 0 | 0.8 | 0.0 | 0.0 to 4.8 |
| Prostate | 177 | 69 | 60.5 | 1.1 | 0.9 to 1.4 |
| Testes | 178 | 1 | 2.1 | 0.5 | 0.0 to 2.6 |
| Penis | 179 | 3 | 1.1 | 2.9 | 0.6 to 8.4 |
| Kidney | 180 | 10 | 9.0 | 1.1 | 0.5 to 2.0 |
| Bladder | 181 | 23 | 18.1 | 1.3 | 0.8 to 1.9 |
| Malignant melanoma | 190 | 3 | 6.1 | 0.5 | 0.1 to 1.4 |
| Other skin | 191 | 8 | 9.6 | 0.8 | 0.4 to 1.6 |
| Brain and nervous system | 193 | 5 | 5.6 | 0.9 | 0.3 to 2.1 |
| Thyroid | 194 | 4 | 1.3 | 3.1 | 0.9 to 8.0 |
| Unspecified | 199 | 13 | 12.1 | 1.1 | 0.6 to 1.8 |
| Lymphatic | 200–2 | 4 | 7.9 | 0.5 | 0.1 to 1.3 |
| Haematopoietic | 203–4 | 13 | 12.6 | 1.0 | 0.6 to 1.8 |
| All other sites | — | 4 | 6.3 | 0.6 | 0.2 to 1.6 |