Means (SE) of working time, sleeping time, and numbers of days off of cases and controls
| Crude | Adjusted | ||||||
|---|---|---|---|---|---|---|---|
| Variable | Reference period* | Case | Control | p Value† | Case | Control | p Value‡ |
| *Period before the onset of acute myocardial infarction in cases and before the interview in controls; †p values are based on ANOVA; ‡p values are based on ANCOVA adjusting for cigarette-year, alcohol drinking, overweight, hypertension, diabetes mellitus, hyperlipidaemia, parental coronary heart disease, job type, and sedentary job. | |||||||
| Working h/week | Past year | 48.8 (1.0) | 45.1 (0.7) | 0.003 | 49.2 (1.0) | 45.2 (0.8) | 0.002 |
| Past month | 47.7 (1.0) | 44.6 (0.8) | 0.02 | 48.0 (1.1) | 44.6 (0.8) | 0.02 | |
| Days off/month | Past year | 9.0 (0.3) | 9.1 (0.2) | 0.71 | 9.0 (0.3) | 9.2 (0.2) | 0.61 |
| Past month | 8.2 (0.3) | 8.4 (0.3) | 0.56 | 8.2 (0.4) | 8.4 (0.3) | 0.56 | |
| Workday sleeping (h) | Past year | 6.8 (0.1) | 6.9 (0.1) | 0.05 | 6.8 (0.1) | 6.9 (0.1) | 0.13 |
| Days off sleeping (h) | Past year | 7.6 (0.1) | 7.7 (0.1) | 0.19 | 7.6 (0.1) | 7.7 (0.1) | 0.23 |
| Days/week of <5 h sleep | Past year | 0.84 (0.1) | 0.55 (0.1) | 0.001 | 0.81 (0.1) | 0.56 (0.1) | 0.01 |
| Past week | 0.95 (0.1) | 0.52 (0.1) | 0.0001 | 0.95 (0.1) | 0.52 (0.1) | 0.0001 | |