Poisson regression analysis* of cerebrovascular disease and ischaemic heart disease mortality in British asbestos workers (1971–2005)
| Cerebrovascular disease | Ischaemic heart disease | |
| Main job | p=0.016 | p≤0.000 |
| Manufacturing | 1.00 | 1.00 |
| Removal | 0.74 (0.60 to 0.90) | 0.72 (0.65 to 0.79) |
| ‘Other exposed’ | 0.88 (0.74 to 1.04) | 0.86 (0.79 to 0.94) |
| Insulation | 0.87 (0.69 to 1.10) | 0.94 (0.84 to 1.05) |
| Year of birth | p≤0.001 | p≤0.001 |
| <1930 | 1.00 | 1.00 |
| 1930–1939 | 0.63 (0.52 to 0.75) | 0.59 (0.54 to 0.64) |
| 1940–1949 | 0.35 (0.25 to 0.49) | 0.37 (0.32 to 0.42) |
| 1950+ | 0.27 (0.16 to 0.44) | 0.19 (0.15 to 0.24) |
| Duration of exposure (years), p=0.190 | p=0.001 | p=0.011 |
| <10 | 1.00 | 1.00 |
| 10–19 | 1.20 (0.93 to 1.56) | 1.16 (1.03 to 1.30) |
| 20–29 | 1.05 (0.80 to 1.37) | 1.10 (0.98 to 1.24) |
| 30–39 | 1.04 (0.79 to 1.38) | 1.15 (1.02 to 1.30) |
| 40+ | 1.22 (0.93 to 1.62) | 1.25 (1.10 to 1.42) |
Data are relative risks of mortality with 95% CIs in parentheses.
↵* For each disease, the data represent a single model including job, year of birth, duration of exposure, sex, age attained and smoking status. Likelihood ratio test p values show the overall effect of each variable in the model.