Characteristics of the participants (N=69 117)
| N | % | Mean | SD | |
| Questionnaire round | ||||
| 2012 | 19 550 | 28.3 | ||
| 2014 | 15 079 | 21.8 | ||
| 2016 | 17 970 | 26.0 | ||
| 2018 | 16 518 | 23.9 | ||
| Age (years) | 69 117 | 46.0 | 10.8 | |
| Gender | ||||
| Men | 32 741 | 47.4 | ||
| Women | 36 376 | 52.6 | ||
| Highest education attained | ||||
| Less than vocational education | 12 100 | 17.6 | ||
| Vocational education | 25 437 | 37.0 | ||
| Higher education | 31 144 | 45.4 | ||
| BMI (kg/m2) | 67 931 | 25.7 | 4.4 | |
| Physical activity during leisure (hours per week) | 68 327 | 5.2 | 3.3 | |
| Smoking | ||||
| Yes, daily | 9878 | 14.5 | ||
| Yes, once in a while | 3541 | 5.2 | ||
| Ex-smoker | 19 780 | 29.0 | ||
| No, never | 35 121 | 51.4 | ||
| Physical work demands (ergonomic index 0–100) | ||||
| Mean | 69 117 | 19.0 | 16.5 | |
| Low (≤10) | 24 726 | 35.8 | ||
| Moderate (>10–20) | 19 549 | 28.3 | ||
| High (>20–30) | 10 794 | 15.6 | ||
| Very high (>30) | 14 048 | 20.3 | ||
| Psychosocial work factors (0–100) | ||||
| Work-life balance | 69 041 | 46.2 | 16.3 | |
| Influence at work | 68 995 | 78.8 | 19.0 | |
| MDI (0–50) | 68 432 | 8.0 | 7.3 | |
Values are percentage of participants or mean and SD.
BMI, body mass index; MDI, Major Depression Inventory.