Table .
Baseline characteristics of the participants. Values are percentage of participants or mean and standard deviations (SD).
| N | % | Mean | SD | |
|---|---|---|---|---|
| Questionnaire round | ||||
| 2012–2014 | 9093 | 48.1 | ||
| 2014–2016 | 653 | 3.5 | ||
| 2016–2018 | 9159 | 48.5 | ||
| Age (years) | 18 905 | 46.7 | 9.7 | |
| Gender | ||||
| Men | 8629 | 45.64 | ||
| Women | 10 276 | 54.36 | ||
| Highest education attained | ||||
| Vocational education or less | 9810 | 52.2 | ||
| Higher education | 8986 | 47.8 | ||
| BMI (kg/m2) | 18 731 | 25.7 | 4.4 | |
| Physical activity during leisure (hours per week) | 18 830 | 5.2 | 3.1 | |
| Smoking | ||||
| Yes, daily | 2567 | 13.6 | ||
| Yes, once in a while | 921 | 4.9 | ||
| Ex-smoker | 5628 | 29.9 | ||
| No, never | 9708 | 51.6 | ||
| Influence at work (0–100) | 18 878 | 79.3 | 18.5 | |
| Pain intensity (0–10) | ||||
| Neck-shoulder | 18 805 | 2.7 | 2.8 | |
| Low-back | 18 816 | 2.4 | 2.8 | |