The ORs (95% CIs) of acute myocardial infarction relative to working time, and numbers of days off in the past month and sleep time in the past week
| OR (95% CI) | ||
|---|---|---|
| Variable | Crude | Adjusted* |
| Matched ORs are based on conditional logistic regression analysis; *adjusted for cigarette-year, alcohol drinking, overweight, hypertension, diabetes mellitus, hyperlipidaemia, parental coronary heart disease, job type, and sedentary job. | ||
| Working h/week: | ||
| ≤40 | 1.0 (referent) | 1.0 (referent) |
| 41–60 | 1.3 (0.9 to 1.9) | 1.2 (0.8 to 1.9) |
| ≥61 | 2.2 (1.4 to 3.7) | 1.9 (1.1 to 3.5) |
| Days off/month: | ||
| ≥8 | 1.0 (referent) | 1.0 (referent) |
| 2–7 | 1.3 (0.9 to 1.8) | 1.3 (0.9 to 1.9) |
| <2 | 1.6 (0.9 to 3.1) | 2.9 (1.3 to 6.5) |
| Days/week of <5 h sleep: | ||
| 0 | 1.0 (referent) | 1.0 (referent) |
| 1 | 1.3 (0.9 to 1.8) | 1.3 (0.8 to 2.0) |
| ≥2 | 3.3 (1.9 to 5.6) | 3.6 (1.9 to 6.9) |