Rate ratios* and 95% CI by cumulative exposure to petroleum coke/spent catalyst for lung cancer† incidence among males from a Canadian petroleum company, 1969–94
| Petroleum coke/spent catalyst (mg/m3-years) | Bronchus & lung (ICD 9th revision 162.2–162.5, 162.8–162.9) |
|---|---|
| *Model includes terms for age, time since hire, calendar period, and smoking. Number (n) is number of cases in exposure category. | |
| †Other malignancies evaluated but not shown due to less than 10 exposed cases includes nose and sinus (160), larynx (161), bladder (188), and kidney cancer (189.0–189.2) (numbers in parentheses are ICD 9th revision codes). | |
| ‡95% CI does not include value of 1.0. | |
| Unexposed | 1.0 |
| n = 32 | |
| >0–<0.005 mg/m3-years | 2.4 (0.7 to 7.8) |
| n = 3 | |
| ⩾0.005–<0.07 mg/m3-years | 0.9 (0.2 to 3.9) |
| n = 2 | |
| ⩾0.07 mg/m3-years | 3.3 (1.4 to 7.7)‡ |
| N = 7 | |