Table 2

 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 smokers0823591.01.0
Bidi smokers:
    <10 per day416391.9 (1.0 to 3.6)2.0 (0.9 to 4.4)
    >10 per day2071398.8 (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 day344653.1 (1.9 to 4.9)3.2 (1.8 to 5.7)
    >10 per day1561289.4 (5.4 to 16.2)9.1 (4.7 to 17.7)
Test for trend: p value<0.0001<0.0001