TABLE 4.
Mortality Results by Job Group of a Canadian Petroleum Cohort (1964–2006), Men and Women Combined
| Maintenance | Operations | Distribution | Miscellaneous Exposure | |||||||||
| Cause of Death | Observed | Expected* | SMR (95% CI) | Observed | Expected* | SMR (95% CI) | Observed | Expected* | SMR (95% CI) | Observed | Expected* | SMR (95% CI) |
| All causes | 217 | 283.0 | 0.77 (0.67–0.88)† | 391 | 540.1 | 0.72 (0.65–0.80)† | 127 | 126.7 | 1.00 (0.84–1.19) | 147 | 187.1 | 0.79 (0.66–0.92)† |
| Infective and parasitic disease (Dx) | x | 7.8 | — | 6 | 16.6 | 0.36 (0.13–0.79)† | 0 | 2.4 | — | 0 | 4.2 | — |
| Acquired immune deficiency syndrome | 0 | 4.9 | — | x | 10.9 | — | 0 | 1.2 | — | 0 | 2.4 | — |
| Malignant neoplasms (MN) | 95 | 86.5 | 1.10 (0.89–1.34) | 127 | 159.0 | 0.80 (0.67–0.95)‡ | 41 | 42.7 | 0.96 (0.69–1.30) | 55 | 58.8 | 0.94 (0.71–1.22) |
| MN buccal cavity and pharynx | x | 2.7 | — | x | 4.9 | — | x | 1.3 | — | 0 | 1.7 | — |
| MN esophagus | x | 2.9 | — | x | 5.4 | — | x | 1.4 | — | x | 1.9 | — |
| MN stomach | 0 | 3.4 | — | 7 | 6.2 | 1.14 (0.46–2.34) | x | 1.7 | — | x | 2.3 | — |
| MN large intestine except rectum | 11 | 7.9 | 1.40 (0.70–2.50) | 15 | 14.4 | 1.04 (0.58–1.72) | x | 4.0 | — | 6 | 5.4 | 1.11 (0.41–2.43) |
| MN rectum and rectosigmoid junction | x | 2.4 | — | x | 4.5 | — | x | 1.2 | — | 0 | 1.6 | — |
| MN liver | x | 1.7 | — | x | 3.3 | — | 0 | 0.8 | — | 0 | 1.1 | — |
| MN gallbladder | 0 | 0.5 | — | x | 0.8 | — | 0 | 0.2 | — | x | 0.3 | — |
| MN pancreas | 6 | 4.4 | 1.36 (0.50–2.95) | 7 | 8.1 | 0.86 (0.35–1.78) | x | 2.2 | — | x | 3.0 | — |
| MN nose/sinuses | 0 | 0.1 | — | 0 | 0.3 | — | 0 | 0.1 | — | x | 0.1 | — |
| MN bronchus and lung | 24 | 27.1 | 0.89 (0.57–1.32) | 27 | 48.5 | 0.56 (0.37–0.81)† | 14 | 14.1 | 0.99 (0.54–1.66) | 24 | 18.7 | 1.28 (0.82–1.91) |
| MN bone | 0 | 0.3 | — | 0 | 0.6 | — | 0 | 0.1 | — | 0 | 0.2 | — |
| Malignant melanoma | x | 1.8 | — | x | 3.6 | — | 0 | 0.8 | — | 0 | 1.1 | — |
| MN of connective and other soft tissue | x | 0.6 | — | x | 1.3 | — | 0 | 0.3 | — | 0 | 0.4 | — |
| Mesothelioma | x | 0.4 | — | x | 0.7 | — | 0 | 0.2 | — | 0 | 0.2 | — |
| MN breast | 0 | 0.2 | — | 0 | 0.8 | — | 0 | 0.1 | — | 0 | 0.4 | — |
| MN cervix uteri | 0 | 0.0 | — | 0 | 0.1 | — | 0 | 0.0 | — | 0 | 0.1 | — |
| MN corpus uteri | 0 | 0.0 | — | 0 | 0.0 | — | 0 | 0.0 | — | 0 | 0.0 | — |
| MN Ovary/Fallopian tube/Broad ligament | 0 | 0.0 | — | 0 | 0.1 | — | 0 | 0.0 | — | 0 | 0.1 | — |
| MN prostate | x | 3.6 | — | 9 | 6.2 | 1.46 (0.67–2.77) | x | 1.9 | — | x | 3.0 | — |
| MN testis | 0 | 0.3 | — | x | 0.7 | — | 0 | 0.1 | — | 0 | 0.2 | — |
| MN kidney | x | 2.6 | — | x | 4.8 | — | x | 1.2 | — | x | 1.7 | — |
| MN bladder | 5 | 1.7 | 3.01 (0.98–7.03) | x | 2.9 | — | x | 0.8 | — | 0 | 1.2 | — |
| Nervous system malignant, benign, and unspecified | x | 4.5 | — | 11 | 8.9 | 1.24 (0.62–2.22) | x | 2.0 | — | x | 2.7 | — |
| All brain tumors | x | 4.3 | — | 11 | 8.5 | 1.30 (0.65–2.33) | x | 1.9 | — | x | 2.6 | — |
| MN - brain | x | 3.9 | — | 10 | 7.5 | 1.33 (0.64–2.44) | x | 1.7 | — | x | 2.3 | — |
| MN CNS tumors (excluding brain) | 0 | 0.1 | — | 0 | 0.2 | — | 0 | 0.0 | — | 0 | 0.1 | — |
| MN site unknown | 7 | 4.0 | 1.77 (0.71–3.63) | 6 | 7.3 | 0.82 (0.30–1.79) | 0 | 2.0 | — | x | 2.7 | — |
| Hodgkin disease | 0 | 0.6 | — | x | 1.2 | — | 0 | 0.2 | — | 0 | 0.3 | — |
| Non-Hodgkin lymphoma | x | 3.7 | — | x | 7.0 | — | x | 1.7 | — | x | 2.3 | — |
| Diffuse Non-Hodgkin lymphoma | x | 2.0 | — | x | 3.6 | — | 0 | 0.9 | — | x | 1.2 | — |
| Follicular non-Hodgkin lymphoma | x | 1.8 | — | x | 3.4 | — | 0 | 0.9 | — | x | 1.2 | — |
| Leukemias | x | 3.3 | — | x | 6.2 | — | x | 1.5 | — | x | 2.1 | — |
| Acute nonlymphocytic leukemia | x | 1.5 | — | x | 2.9 | — | x | 0.7 | — | x | 1.0 | — |
| Acute myeloid leukemia | x | 1.0 | — | x | 2.0 | — | x | 0.5 | — | 0 | 0.7 | — |
| Chronic myeloid leukemia | 0 | 0.4 | — | 0 | 0.8 | — | 0 | 0.2 | — | 0 | 0.3 | — |
| Acute lymphoid leukemia | x | 0.3 | — | 0 | 0.6 | — | 0 | 0.1 | — | 0 | 0.2 | — |
| Chronic lymphoid leukemia | 0 | 0.5 | — | x | 0.9 | — | 0 | 0.3 | — | 0 | 0.4 | — |
| Other leukemia | 0 | 0.5 | — | x | 1.0 | — | 0 | 0.3 | — | 0 | 0.4 | — |
| Multiple myeloma and immunoproliferative Dx | x | 1.3 | — | x | 2.4 | — | x | 0.7 | — | 0 | 0.9 | — |
| Multiple myeloma | x | 1.3 | — | x | 2.4 | — | x | 0.7 | — | 0 | 0.9 | — |
| Myelodysplastic syndrome | 0 | 0.2 | — | 0 | 0.3 | — | 0 | 0.1 | — | 0 | 0.1 | — |
| Chronic myeloproliferative disease | 0 | 0.2 | — | x | 0.3 | — | 0 | 0.1 | — | 0 | 0.1 | — |
| Benign neoplasms | 0 | 0.2 | — | x | 0.4 | — | 0 | 0.1 | — | 0 | 0.1 | — |
| Dx of blood and blood-forming organs | x | 0.7 | — | x | 1.3 | — | 0 | 0.3 | — | 0 | 0.4 | — |
| Aplastic anemia | x | 0.1 | — | x | 0.2 | — | 0 | 0.0 | — | 0 | 0.1 | — |
| Endocrine/Nutritional/Metabolic Dx | 5 | 8.8 | 0.57 (0.19–1.33) | 12 | 16.5 | 0.73 (0.38–1.27) | x | 4.1 | — | 6 | 5.8 | 1.03 (0.38–2.24) |
| Diabetes mellitus | x | 6.6 | — | 9 | 12.2 | 0.74 (0.34–1.40) | x | 3.2 | — | 6 | 4.5 | 1.35 (0.49–2.93) |
| Amyotrophic lateral sclerosis | 0 | 1.0 | — | x | 1.9 | — | x | 0.5 | — | 0 | 0.6 | — |
| Circulatory disease | 56 | 78.1 | 0.72 (0.54–0.93)‡ | 91 | 140.6 | 0.65 (0.52–0.80)† | 45 | 38.0 | 1.19 (0.87–1.59) | 43 | 55.4 | 0.78 (0.56–1.05) |
| Cerebrovascular disease | 5 | 9.2 | 0.54 (0.18–1.27) | 10 | 16.7 | 0.60 (0.29–1.10) | 6 | 4.3 | 1.39 (0.51–3.02) | x | 6.8 | — |
| Acute myocardial infarction | 22 | 31.5 | 0.70 (0.44–1.06) | 29 | 55.9 | 0.52 (0.35–0.74)† | 20 | 15.7 | 1.27 (0.78–1.96) | 14 | 22.2 | 0.63 (0.35–1.06) |
| Dx of arteries, arterioles, and capillaries | x | 3.5 | — | x | 6.2 | — | 0 | 1.7 | — | x | 2.6 | — |
| Aortic aneurysm | x | 2.0 | — | x | 3.6 | — | 0 | 1.0 | — | x | 1.5 | — |
| Respiratory disease | 9 | 11.6 | 0.78 (0.35–1.47) | 20 | 20.7 | 0.97 (0.59–1.50) | 5 | 5.5 | 0.91 (0.30–2.12) | 7 | 9.1 | 0.77 (0.31–1.59) |
| Chronic obstructive pulmonary Dx | x | 4.2 | — | 6 | 7.2 | 0.84 (0.31–1.82) | x | 2.1 | — | 5 | 3.5 | 1.41 (0.46–3.29) |
| Digestive disease | 7 | 13.0 | 0.54 (0.22–1.11) | 14 | 24.4 | 0.57 (0.31–0.96)‡ | x | 6.2 | — | x | 8.5 | — |
| Cirrhosis of liver | 5 | 7.7 | 0.65 (0.21–1.51) | 10 | 14.5 | 0.69 (0.33–1.27) | x | 3.8 | — | x | 4.9 | — |
| Diseases of pancreas | x | 0.7 | — | 0 | 1.3 | — | 0 | 0.3 | — | x | 0.4 | — |
| Genitourinary disease | x | 2.5 | — | x | 4.5 | — | x | 1.2 | — | x | 1.9 | — |
| Kidney diseases | x | 2.2 | — | x | 4.0 | — | x | 1.0 | — | x | 1.6 | — |
| Accidents/Poisonings/Violence | 33 | 55.2 | 0.60 (0.41–0.84)† | 89 | 119.3 | 0.75 (0.60–0.92)† | 21 | 18.9 | 1.11 (0.69–1.70) | 19 | 30.8 | 0.62 (0.37–0.96)‡ |
| Motor vehicle traffic accidents | 14 | 14.2 | 0.99 (0.54–1.65) | 29 | 31.3 | 0.93 (0.62–1.33) | 9 | 4.8 | 1.87 (0.86–3.55) | 6 | 8.0 | 0.75 (0.28–1.64) |
| Motor vehicle nontraffic accidents | 0 | 0.6 | — | x | 1.3 | — | 0 | 0.2 | — | x | 0.3 | — |
| Water transport accidents | x | 1.2 | — | x | 2.5 | — | 0 | 0.5 | — | 0 | 0.7 | — |
| Air and space transport accidents | x | 0.8 | — | x | 1.7 | — | x | 0.3 | — | 0 | 0.5 | — |
| All other accidents | 6 | 14.8 | 0.41 (0.15–0.89)‡ | 25 | 31.2 | 0.80 (0.52–1.18) | x | 5.4 | — | x | 8.5 | — |
| Suicide | 10 | 18.8 | 0.53 (0.26–0.98)‡ | 19 | 40.7 | 0.47 (0.28–0.73)† | 6 | 6.1 | 0.99 (0.36–2.16) | 6 | 10.2 | 0.59 (0.22–1.28) |
x Observations in the 1–4 observed range are not reported in accordance with disclosure rules of Statistics Canada.
SMR (95% CI), standardized mortality ratio (95% confidence interval).
*Expected deaths based on Canadian general population mortality rates.
†Statistically significant at P < 0.01.
‡Statistically significant at P < 0.05.