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Incidence of lung cancer by smoking (1982–2004): Results of the survival analysis among 21,340 respondents
| 1975–1981 smoking status | Number of subjects | Number of cases | Hazard ratioa | 95% CI |
| Never-smokers | 9,752 | 17 | 1.00 | Reference |
| Intermittent smokers | 641 | 1 | 1.00 | 0.13–7.52 |
| Lifetime regular smokers | 10,646 | 192 | 11.0 | 6.66–18.2 |
| Other smokers | 301 | 3 | 6.09 | 1.76–21.1 |
Note. Hazard ratio adjusted for age and sex.
