Table 2.
Detailed description of the outcome measures that will be assessed in the trial
| Questionnaire/Test | Functions/Parameters | Description |
|---|---|---|
| Musculoskeletal paina | ||
| 0–10 Numerical Rating Scale (NRS) for pain [41] | Pain intensity (average and worst) | Intensity during last 7 days (0–10) |
| Ad hoc question | Pain frequency | Days in pain during last 7 days (0–7) |
| Ad hoc question | Pain interference | Days in which pain negatively interferes with work during the last 7 days (0–7) |
| Ad hoc question | Pain medication consumption | Days of analgesic medication consumption during last 7 days (0–7) |
| Psycho-affective state | ||
| Subjective Happiness Scale [42] | Happiness | 4 items measuring perceived current happiness (1–7) |
| Goldberg Anxiety and Depression Scale [43] | Anxiety and depression | 9 items measuring anxious (0–9) and 9 items measuring depressive (0–9) symptoms during last month |
| Maslach Burnout Inventory (MBI) [44] | Burnout | 9, 5 and 8 items measuring frequency of feelings related to emotional exhaustion (0–54), depersonalization (0–30) and personal accomplishment (0–48), respectively |
| Single-Item Sleep Quality Scale [45] | Sleep quality | Single item measuring sleep quality during last 7 days (0–10) |
| Ad hoc question | Hypnotic/anxiolytic medication consumption | Days of hypnotic/anxiolytic medication consumption during last 7 days (0–7) |
| EuroQol-5D 0–100 Health State Scale [46] | Quality of life | Single item measuring self-perceived current health state (0–100) |
| Work-related variables | ||
| Work Ability Score (WAS) [47] | Work ability | Single item measuring self-perceived current work ability (0–10) |
| World Health Organization Health and Work Performance Questionnaire (HPQ) [48] | Work performance | Single item measuring self-perceived work performance during last 7 days (0–10) |
| Borg’s CR-10 Scale [49] | Physical exertion at work | Single item measuring self-perceived physical exertion at work during last 7 days (0–10) |
| Institution’s registry and self-reported | Work absenteeism | Presence of absenteeism (yes/no), days of absence (n) and reason during last year |
| Physical fitness | ||
| 5-repetition sit to stand test (5RSTS) [50] | Lower extremity muscle performance | Time to stand up from and sit down on a chair 5 times, mean of two attempts (seconds) |
| Kneeling push-up test (KPU) [51] | Upper body muscle performance | Maximum number of kneeling push-ups (repetitions) |
| Shirado-Ito trunk flexor endurance test (SIF) [52] | Trunk muscle performance | Maximum time in a defined trunk flexion position (seconds) |
aPain intensity, frequency and interference will be collected separately in 4 body locations: the low back, neck, shoulders, and hands/wrists. Average pain intensity in the low back will be the primary outcome measure