Characteristics of the study population at baseline by type of work
| Repetitive work n = 2033 | Non-repetitive work n = 813 | |
|---|---|---|
| *Comparison of repetitive versus not repetitive work: p<0.05 (t test or χ2 test as appropriate). | ||
| %, column percentages. | ||
| MVC, maximal voluntary contraction. | ||
| Individual characteristics | ||
| Gender female, % | 67.1* | 44.8 |
| Age at baseline, years, mean (SD) | 38.4* (11) | 39.6 (10) |
| Area | ||
| Glostrup, % | 39.5 | 37.9 |
| Aarhus, % | 20.7* | 35.4 |
| Herning, % | 39.8* | 26.7 |
| Physically active in leisure time, % | 29.8* | 37.2 |
| Body mass index, kg/m2, mean (SD) | 24.5* (4.3) | 25.0 (4.1) |
| Algometric pressure threshold, kPa, mean (SD) | 624* (220) | 685 (225) |
| Living as married, % | 76.2 | 78.4 |
| High intrinsic effort behaviour, % | 26.6 | 30.2 |
| Self-reported psychiatric disorder, % | 4.2 | 4.4 |
| Physical measures of repetitive work | ||
| Duration of work task (cycle time), seconds, mean (SD) | 115.5 (427) | – |
| Duration of exertion, % of cycle time, mean (SD) | 72.6 (27) | – |
| Repetitions in wrist, n/minute, mean (SD) | 13.8 (8.4) | – |
| Force requirements, dominant wrist (%) | ||
| ⩽10% MVC | 53.7 | – |
| >10% MVC | 46.3 | – |