The ORs (95% CI) of acute myocardial infarction relative to few days off, short sleep, and insufficient sleep according to weekly working hours in the past year
| Days off or sleep | ≤60 OR (95%CI) | ≥61 OR (95%CI) | p Value for interaction |
|---|---|---|---|
| Adjusted for cigarette-year, alcohol drinking, overweight, hypertension, diabetes mellitus, hyperlipidaemia, parental coronary heart disease, job type, and sedentary job; p values are based on the likelihood ratio test. | |||
| Days off/month: | |||
| ≥2 | 1.0 (referent) | 1.3 (0.8 to 2.4) | |
| <2 | 1.5 (0.3 to 7.1) | 3.6 (0.7 to 19.0) | 0.70 |
| Working day sleep (h): | |||
| ≥6 | 1.0 (referent) | 1.4 (0.8 to 2.5) | |
| ≤5 | 2.2 (0.9 to 5.2) | 4.8 (0.9 to 26.4) | 0.66 |
| Day off sleep (h): | |||
| ≥6 | 1.0 (referent) | 1.5 (0.9 to 2.6) | |
| ≤5 | 1.6 (0.5 to 4.8) | 3.3 (0.3 to 35.6) | 0.81 |
| Days/week of <5 h sleep: | |||
| ≤1 | 1.0 (referent) | 1.5 (0.9 to 2.8) | |
| ≥2 | 2.5 (0.9 to 6.4) | 1.5 (0.4 to 5.9) | 0.40 |