Conditional odds ratios (95% confidence intervals) for myocardial infarction by combinations of reported cigarette consumption and number of clinical risk factors present
| Cigarettes per day | |||
|---|---|---|---|
|
Clinical risk factors (n)2-150 | Non-smokers | 1–19 | ⩾ 20 |
| 0 | 1 | 2.51 (1.07 to 5.91) | 14.5 (7.22 to 29.3) |
| 1 | 1.22 (0.62 to 2.4) | 9.11 (4.66 to 17.8) | 26.1 (14.0 to 48.7) |
| 2 | 3.04 (1.53 to 6.06) | 12.5 (5.68 to 27.4) | 36.2 (18.9 to 69.5) |
| ⩾ 3 | 6.74 (3.46 to 13.1) | 35.8 (17.9 to 71.8) | 66.8 (34.7 to 129) |
↵2-150 Hypertension, hyperlipidaemia, angina, or diabetes mellitus.