Standardised incidence ratios (SIR) for primary lung cancer among men by latest held job category
| Latest held job category | Obs | SIR | 95% CI |
|---|---|---|---|
| Navigation officer | 76 | 1.3 | 1.0 to 1.6 |
| Radio officer | 4 | 1.4 | 0.4 to 3.5 |
| Engine officer | 36 | 1.2 | 0.9 to 1.7 |
| Ratings, deck | 64 | 1.9 | 1.4 to 2.4 |
| Engine room crew | 33 | 2.3 | 1.6 to 3.3 |
| Catering crew | 19 | 2.1 | 1.3 to 3.2 |
| Galley crew | 15 | 1.7 | 1.0 to 2.9 |
| Maintenance crew | 11 | 4.1 | 2.1 to 7.4 |
| Other | 1 | 1.4 | 0.0 to 7.8 |
| Total | 259 | 1.6 | 1.4 to 1.8 |