Table 1.
Key features of participants at baseline
| Total | Men | Women | ||
|---|---|---|---|---|
| Age (years) | ||||
| M | 44.2 | 44.3 | 42.6 | |
| SD | 9.4 | 9.4 | 9.0 | |
| Educational attainment (%) | ||||
| High school or below | 31.4 | 31.4 | 31.3 | |
| Junior college | 9.1 | 5.8 | 37.0 | |
| College | 42.6 | 44.4 | 26.6 | |
| Graduate school | 17.0 | 18.4 | 5.2 | |
| Job classification (%) | ||||
| Managerial workers | 25.6 | 28.4 | 1.6 | |
| Non-manual workers | 47.1 | 41.7 | 93.8 | |
| Manual workers | 18.1 | 20.0 | 1.6 | |
| Other workers | 9.2 | 9.9 | 3.1 | |
| Type of service (%) | ||||
| Only day service | 94.9 | 94.3 | 99.5 | |
| Shift service (including night service) | 4.5 | 4.9 | 0.5 | |
| Shift service (excluding night service) | 0.6 | 0.7 | 0.0 | |
| Hours worked per week (%) | ||||
| Less than 30 hours | 2.8 | 2.8 | 2.6 | |
| 31-40 hours | 17.6 | 15.5 | 35.4 | |
| 41-50 hours | 49.8 | 49.5 | 52.1 | |
| 51-60 hours | 22.3 | 23.8 | 9.4 | |
| 61 hours or more | 7.5 | 8.3 | 0.5 | |
| Smoking (%) | ||||
| Not smoking | 60.2 | 56.7 | 90.6 | |
| Quitted smoking | 11.7 | 12.5 | 4.2 | |
| Smoking | 28.1 | 30.8 | 5.2 | |
| Alcohol consumption | ||||
| Never | 28.8 | 26.6 | 47.9 | |
| Sometimes | 36.2 | 36.1 | 37.0 | |
| Almost every day | 35.0 | 37.3 | 15.1 | |
| Physical activity | ||||
| Never | 54.0 | 53.4 | 59.4 | |
| Light exercise once or more a week | 26.8 | 27.2 | 22.9 | |
| Moderate or more exercise once or twice a week | 14.8 | 14.9 | 13.5 | |
| Moderate or more exercise three times or more a week | 4.4 | 4.5 | 4.2 | |
| Income (thousand yen, household-size-adjusted) | ||||
| M | 4,659 | 4,616 | 5,030 | |
| SD | 1,948 | 1,931 | 2,056 | |
| n | 1,853 | 1,661 | 192 | |