Observed (Obs) and expected (Exp) number of cancers, SIR (95% CI) among 458 pilots (9215.5 person-years, 1955–97)
| Cancer sites (ICD-7)2-150 | Obs | Exp | SIR | 95% CI |
| All cancers (140-205) | 23 | 23.68 | 0.97 | 0.62 to 1.46 |
| Oesophagus (150) | 1 | 0.36 | 2.78 | 0.04 to 15.45 |
| Colon (153) | 1 | 1.57 | 0.64 | 0.01 to 3.54 |
| Gall bladder (155.1) | 1 | 0.12 | 8.33 | 0.11 to 46.36 |
| Lung (162) | 2 | 3.13 | 0.64 | 0.07 to 2.31 |
| Prostate (177) | 5 | 3.91 | 1.28 | 0.41 to 2.98 |
| Kidney (180) | 2 | 1.41 | 1.42 | 0.16 to 5.12 |
| Malignant melanoma of the skin (190) | 5 | 0.49 | 10.20 | 3.29 to 23.81 |
| Eye (192) | 1 | 0.10 | 10.00 | 0.13 to 55.64 |
| Brain (193) | 2 | 1.14 | 1.75 | 0.20 to 6.33 |
| Thyroid (194) | 1 | 0.67 | 1.49 | 0.02 to 8.30 |
| Unspecified sites (199) | 1 | 0.49 | 2.04 | 0.03 to 11.35 |
| Leukaemia (204) | 1 | 0.59 | 1.69 | 0.02 to 9.43 |
| Acute myeloid leukaemia (204) | 1 | 0.26 | 3.85 | 0.05 to 21.40 |
↵2-150 Categories with only one cancer case are shown for the sake of completeness.
ICD-7= International classification of diseases, 7th revision.