Table 1 Description of the material (n = 1211).
| Mean | SD | Minimum | Maximum | |
|---|---|---|---|---|
| Computer time (h/w) | ||||
| Questionnaire data | 24.7 | 6.9 | 0 | 39 |
| WPR data | 10.8 | 4.8 | 0.12 | 30.6 |
| Mouse time (h/w) | ||||
| Questionnaire data | 15.6 | 8.3 | 0 | 38 |
| WPR data | 7.1 | 4.2 | 0.01 | 22.2 |
| Keyboard time (h/w) | ||||
| Questionnaire data | 8.9 | 5.5 | 0 | 35 |
| WPR data | 1.5 | 1.2 | 0.03 | 11.7 |
| Computer time (proportion) | ||||
| Questionnaire data | 0.78 | 0.21 | 0.10 | 1.00 |
| WPR data | 0.30 | 0.14 | 0 | 0.83 |
| Mouse time (proportion) | ||||
| Questionnaire data | 0.61 | 0.25 | 0 | 1.00 |
| WPR data | 0.62 | 0.15 | 0 | 0.91 |
| Keyboard time (proportion) | ||||
| Questionnaire data | 0.38 | 0.23 | 0 | 1.00 |
| WPR data | 0.15 | 0.10 | 0 | 0.65 |
| Standard deviations of 4 weekly means (WPR data) | ||||
| Computer time (h/w) | 3.2 | 2.0 | 0.13 | 14.9 |
| Mouse time (h/w) | 2.3 | 1.6 | 0.03 | 10.7 |
| Keyboard time (h/w) | 0.55 | 0.48 | 0.01 | 4.3 |
| Computer time proportion | 0.090 | 0.055 | 0.003 | 0.40 |
| Mouse time proportion | 0.053 | 0.040 | 0.002 | 0.38 |
| Keyboard time proportion | 0.037 | 0.032 | 0.001 | 0.49 |
| Age | 43 | 8.6 | 21 | 63 |
| n | (%) | |||
| Maximum arm pain status* | ||||
| No pain | 657 | (54) | ||
| Very mild or mild | 279 | (23) | ||
| Mild to moderate or moderate | 222 | (18) | ||
| More than moderate | 52 | (4) | ||
| Female gender | 891 | (74) | ||
| High demands | 437 | (36) | ||
| Low influence | 426 | (35) | ||
| Low social support | 485 | (40) | ||
| Strain | 200 | (17) | ||
| Negative affectivity | 153 | (13) | ||
| Type A behaviour | 172 | (14) | ||
| Low self efficacy | 221 | (18) | ||
| Worried about health | 230 | (19) |
*Maximum 7‐day pain score at follow‐up of left or right hand/wrist, forearm or elbow regions.
†For definitions of times and proportions, see text.