Distribution and univariate odds ratios of selected variables between cases and controls
| Variable | Positive recording (n (%) except where indicated) | Univariate odds ratio (95% CI) | |||
|---|---|---|---|---|---|
| Cases | Controls | ||||
| Age (years) (median) | 40.6 | 40.7 | |||
| (interquartile range) | (37.4–42.9) | (37.4–42.9) | |||
| Past medical history | |||||
| Hypertension | 81 (18.1) | 88 (5.1) | 4.23 (3.03 to 5.89) | ||
| Angina | 22 (4.9) | 10 (0.6) | 9.27 (4.26 to 20.2) | ||
| Hyperlipidaemia | 34 (7.6) | 51 (3.0) | 2.68 (1.70 to 4.23) | ||
| Diabetes mellitus | 52 (11.6) | 17 (1.0) | 14.1 (7.82 to 25.5) | ||
| Smoking history | |||||
| Smoked in last year | 360 (80.4) | 520 (30.1) | 9.99 (7.58 to 13.2) | ||
| Ever smoked cigarettes | 394 (87.9) | 899 (52.0) | 6.88 (5.05 to 9.36) | ||
| Contraception | |||||
| Combined oral contraceptive4-150 | 40 (9.2) | 180 (10.7) | 0.79 (0.54 to 1.17) | ||
↵4-150 Use within three months before myocardial infarction.