Table 4.
Observed numbers of selected cancers among male airline pilots in the Nordic countries and relative risk (95% confidence interval) estimates derived from Poisson regression model, by estimated cumulative dose. Adjusted for age and calendar period
| Cumulative dose (μSv)
|
All sites*
|
Skin melanoma
|
Other skin*
|
Basal cell carcinoma†
|
Leukaemia, excluding chronic lymphatic
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No
|
Relative risk
|
No
|
Relative risk
|
No
|
Relative risk
|
No
|
Relative risk
|
No
|
Relative risk
|
|||||
| 1-2999 | 149 | 1 (reference) | 14 | 1 (reference) | 7 | 1 (reference) | 7 | 1 (reference) | 3 | 1 (reference) | ||||
| 3000-9999 | 52 | 1.12 (0.81 to 1.53) | 9 | 2.10 (0.91 to 4.87) | 1 | 0.52 (0.06 to 4.26) | 6 | 1.83 (0.70 to 4.79) | 2 | 1.90 (0.32 to 11.5) | ||||
| 10 000-19 999 | 93 | 1.19 (0.92 to 1.54) | 13 | 2.20‡ (1.03 to 4.72) | 6 | 1.50 (0.50 to 4.48) | 8 | 1.42 (0.60 to 3.41) | 2 | 1.42 (0.23 to 8.70) | ||||
| ⩾20 000 | 137 | 1.19 (0.93 to 1.51) | 17 | 2.78‡ (1.30 to 5.93) | 12 | 1.92 (0.74 to 4.98) | 32 | 1.86 (0.98 to 3.54) | 3 | 1.78 (0.32 to 10.0) | ||||
| P trend | 0.13 | 0.007 | 0.14 | 0.17 | 0.53 | |||||||||
*
Excludes basal cell carcinoma and, in Denmark, all non-melanoma skin cancers diagnosed before 1979.
†
Only Denmark (1979-96) and Finland (1953-97).
‡
Significant at P<0.05.