Relative risk (RR) of acute incident myocardial infarction (MI) in males according to amount of current cigarette or bidi smoking
| Smoking status* | Median (cigarette or bidi per day) | Cases (n)† | Controls (n)† | Age and hospital adjusted RR (95% CI) | Multivariate RR (95% CI) |
|---|---|---|---|---|---|
| *Never smokers does not include bidi smokers, cigarette smokers, or users of other forms of tobacco. Current smokers of bidis and cigarettes are presented. | |||||
| †Approximately n = 19 cases and n = 8 controls smoked both cigarettes and bidis and are represented in both groups. | |||||
| Never smokers | 0 | 82 | 359 | 1.0 | 1.0 |
| Bidi smokers: | |||||
| <10 per day | 4 | 16 | 39 | 1.9 (1.0 to 3.6) | 2.0 (0.9 to 4.4) |
| >10 per day | 20 | 71 | 39 | 8.8 (5.2 to 14.8) | 8.1 (4.3 to 15.3) |
| Test for trend: p value | <0.0001 | <0.0001 | |||
| Cigarette smokers | |||||
| <10 per day | 3 | 44 | 65 | 3.1 (1.9 to 4.9) | 3.2 (1.8 to 5.7) |
| >10 per day | 15 | 61 | 28 | 9.4 (5.4 to 16.2) | 9.1 (4.7 to 17.7) |
| Test for trend: p value | <0.0001 | <0.0001 | |||