Table 8 Comparison of the relative risks (95% CI) in reducers v heavy smokers from the study of the three Norwegian counties with those presented from the Copenhagen Centre for Prospective Population Studies, both sexes*.
| End point | Copenhagen, Denmark | Three counties, Norway |
|---|---|---|
| All deaths | 1.02 (0.89 to 1.17) | 1.02 (0.84 to 1.22) |
| Cardiovascular disease | 1.01 (0.76 to 1.35) | 1.02 (0.75 to 1.39) |
| Ischaemic heart disease | 1.15 (0.94 to 1.40) | 0.96 (0.65 to 1.41) |
| Smoking‐related cancer | 0.91 (0.63 to 1.31) | 0.86 (0.57 to 1.28) |
| Lung cancer | 0.73 (0.54 to 0.98) | 0.66 (0.36 to 1.21) |
*In the Norwegian counties, the risks are based on deaths only; in Copenhagen the same applies for cardiovascular disease and smoking‐related cancer. In Copehagen, ischaemic heart disease refers to fatal and non‐fatal endpoints and lung cancer to incidence.