Observed and expected deaths (O/E), SMR, and 95% confidence intervals (95% CI) for lung cancer by duration of employment and time since first exposure, 1951–88
| Duration of employment (y) | |||
|---|---|---|---|
| Time since first exposure (y) | 5–15 | 15+ | p value test for trend |
| 5–15 | |||
| O/E | 1/0.3 | – | |
| SMR | 3.33 | – | |
| 95% CI | 0.03 to 1.86 | – | |
| 15+ | |||
| O/E | 5/1.3 | 3/1.9 | |
| SMR | 3.96 | 1.57 | 0.37 |
| 95% CI | 1.29 to 9.24 | 0.32 to 4.59 | |