Baseline characteristics
| Variable | Percentage or mean |
|---|---|
| SD in parentheses where applicable. | |
| Gender | |
| Male | 73.8% |
| Female | 26.2% |
| Age | 40.9 (8.9) |
| Educational level | |
| Low (primary, lower vocational, or lower secondary school) | 31.9% |
| Intermediate (intermediate vocational or secondary school) | 32.5% |
| Higher (higher vocational school or university | 35.6% |
| Reporting a chronic condition | |
| No | 76.8% |
| Yes | 23.2% |
| CIS fatigue score | 55.8 (22.7) |