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Lung cancer in miners according to smoking status [3]
| Group followed | Mean WLM | Person-years at risk | Lung Cancer | Attributable cancers | Ratio of risk in smokers and nonsmokers | |
|---|---|---|---|---|---|---|
| Observed (95 % CI) | Exp. | |||||
| Nonsmokers | 31.7 | 5138 | 3 (0.7–9.3) | 0.3 | 16.6 | 1.6 |
| Smokers | 29.7 | 9420 | 19 (12.1–29.4) | 11.7 | 26.1 | |
| Total | 30.4 | 14,558 | 22 (14.6–32.5) | 12.0 | 22.6 | |
WLM working level month
