Table 3 Hazard ratios (HR) including 95% CI for selected neoplastic causes of death, ordered by decreasing exposure of occupation (highest exposure: Alpine train drivers, lowest exposure (reference): station masters).
| Outcome | Alpine train driversHR (95% CI) | Lowland train driversHR (95% CI) | Shunting yard engineersHR (95% CI) | Train attendantsHR (95% CI) | Station masters (ref.)HR | Test for trend†p Value |
|---|---|---|---|---|---|---|
| All‐cause mortality | 1.01 (0.87 to 1.17) | 1.02 (0.95 to 1.10) | 1.12 (1.00 to 1.26) | 1.13 (1.05 to 1.21) | 1 | 0.787 |
| Tumour, all | 1.25 (0.99 to 1.58) | 1.04 (0.91 to 1.18) | 1.06 (0.87 to 1.29) | 1.03 (0.91 to 1.17) | 1 | 0.119 |
| Respiratory tumour | 1.04 (0.60 to 1.80) | 0.98 (0.73 to 1.31) | 1.05 (0.70 to 1.60) | 1.11 (0.85 to 1.44) | 1 | 0.865 |
| Haematopoietic and lymphatic malignancies | 1.46 (0.70 to 3.02) | 1.12 (0.73 to 1.73) | 1.44 (0.81 to 2.57) | 0.95 (0.62 to 1.45) | 1 | 0.250 |
| Hodgkin's disease | 3.32 (0.30 to 36.89) | 3.28 (0.68 to 15.97) | 1.50 (0.13 to 16.78) | 1.51 (0.27 to 8.32) | 1 | 0.062 |
| Non‐Hodgkin's disease | 1.68 (0.47 to 6.03) | 0.80 (0.34 to 1.87) | 1.49 (0.56 to 4.00) | 0.87 (0.40 to 1.88) | 1 | 0.947 |
| Leukaemia | 0.87 (0.20 to 3.83) | 1.52 (0.78 to 2.97) | 1.49 (0.57 to 3.92) | 1.07 (0.54 to 2.11) | 1 | 0.280 |
| Lymphoid leukaemia | –* | 0.68 (0.28 to 1.62) | 1.27 (0.40 to 4.02) | 0.58 (0.26 to 1.34) | 1 | 0.263 |
| Myeloid leukaemia | 6.44 (0.90 to 45.95) | 4.46 (0.95 to 20.89) | 3.08 (0.43 to 22.05) | 3.07 (0.65 to 14.57) | 1 | 0.035 |
| Brain tumour | –* | 0.64 (0.23 to 1.79) | 1.54 (0.52 to 4.54) | 1.28 (0.58 to 2.86) | 1 | 0.130 |
*No cases.
†Mantel–Cox score test for trends.