Risk of MI in relation to (A) smoking and (B) pack-years
| (A) Smoking status | ||||
| Cases (n=394) | Controls (n=465) | Age OR (95% CI) | aOR (95% CI) | |
| Current smokers | 146 (37.1) | 105 (22.6) | 3.1 (2.2 to 4.5) | 2.7 (1.7 to 4.2) |
| Ex-smokers | 145 (36.8) | 161 (34.6) | 1.7 (1.2 to 2.4) | 1.6 (1.0 to 2.4) |
| Non-smokers | 103 (26.1) | 199 (42.8) | 1.0 | 1.0 |