SMR for stomach, oesophageal and liver cancers by cumulative exposure in asbestos miners, 1981–2006
| Cumulative asbestos dust exposure level* | Obs† | Person years | SMR (95% CI) |
|---|---|---|---|
| Stomach cancer | |||
| Level 1 | 5 | 28 268.2 | 0.69 (0.30 to 1.62) |
| Level 2 | 5 | 4684.8 | 2.39 (1.02 to 5.60) |
| Level 3 | 5 | 1782.5 | 6.49 (2.77 to 15.20) |
| P for trend | <0.001 | ||
| Oesophageal cancer | |||
| Level 1 | 3 | 28 443.0 | 0.60 (0.20 to 1.77) |
| Level 2 | 3 | 752.3 | 10.28 (1.86 to 38.01) |
| Level 3 | 3 | 3740.3 | 2.75 (0.94 to 8.09) |
| P for trend | 0.091 | ||
| Liver cancer | |||
| Level 1 | 6 | 28 685.4 | 0.50 (0.23 to 1.10) |
| Level 2 | 6 | 1300.5 | 5.59 (1.48 to 14.57) |
| Level 3 | 6 | 4749.6 | 1.95 (0.89 to 4.25) |
| P for trend | 0.073 | ||
*Time-dependent variable with a lag of 10 years.
†Observed number of death.
SMR, standardized mortality ratio.