Mortality rate ratios (MRRs) from lung cancer according to selected indicators of asbestos exposure
| MRR | 95% CI | |
| Duration of exposure (years) | ||
| <10 | 1.00 | Ref. |
| 10–19 | 1.73 | 0.81 to 3.70 |
| 20–29 | 1.05 | 0.48 to 2.31 |
| 30+ | 1.48 | 0.64 to 3.42 |
| p for linear trend | 0.50 | |
| Time since first exposure (years) | ||
| <20 | 1.00 | Ref. |
| 20–29 | 0.78 | 0.21 to 2.86 |
| 30–39 | 0.83 | 0.18 to 3.79 |
| 40+ | 1.89 | 0.30 to 11.81 |
| p for linear trend | 0.31 | |
| Time since last exposure (years) | ||
| During exposure | 1.00 | Ref. |
| 1–9 | 2.97 | 0.60 to 14.69 |
| 10–29 | 1.63 | 0.32 to 8.24 |
| ≥30 | 2.12 | 0.38 to 11.78 |
| p for linear trend | 0.93 | |
| Cumulative dust exposure (fibre/mL-years) | ||
| <100 | 1.00 | Ref. |
| 100–<400 | 1.84 | 0.91 to 3.71 |
| ≥400 | 1.54 | 0.76 to 3.10 |
| p for linear trend | 0.26 | |
Asbestos miners in Balangero, Italy, 1946–2014.
Ref., reference category.
Deaths and person-years beyond age 85 were excluded.
Regression models included age (time-varying), period at first exposure (except the analysis of cumulative dust exposure) and age at first exposure.