Table 2 Distribution of questionnaire and WPR‐data on computer, mouse and keyboard times (h/w or proportions)*.
| Mean (h/w) of questionnaire and WPR times within WPR quartile category | Ratio between questionnaire and WPR mean | |
|---|---|---|
| Computer time (h/w) | ||
| Lower WPR quartile (0.1–7.2) | ||
| Questionnaire data | 19.6 | 3.8 |
| WPR data | 5.1 | |
| Inter WPR quartile (7.2–14) | ||
| Questionnaire data | 25.2 | 2.4 |
| WPR data | 10.4 | |
| Upper WPR quartile (14–31) | ||
| Questionnaire data | 28.8 | 1.7 |
| WPR data | 17.2 | |
| Mouse time (h/w) | ||
| Lower WPR quartile (0.0–3.8) | ||
| Questionnaire data | 8.5 | 3.5 |
| WPR data | 2.4 | |
| Inter WPR quartile (3.8–9.8) | ||
| Questionnaire data | 16.3 | 2.5 |
| WPR data | 6.6 | |
| Upper WPR quartile (9.8–22) | ||
| Questionnaire data | 21.4 | 1.7 |
| WPR data | 12.8 | |
| Keyboard time (h/w) | ||
| Lower WPR quartile (0.0–0.7) | ||
| Questionnaire data | 6.3 | 12.6 |
| WPR data | 0.5 | |
| Inter WPR quartile (0.7–1.9) | ||
| Questionnaire data | 8.7 | 7.3 |
| WPR data | 1.2 | |
| Upper WPR quartile (1.9–12) | ||
| Questionnaire data | 11.8 | 3.9 |
| WPR data | 3.0 | |
| Computer time (proportion) | ||
| Lower WPR quartile (0.0–0.21) | ||
| Questionnaire data | 0.62 | 4.4 |
| WPR data | 0.14 | |
| Inter WPR quartile (0.21–0.39) | ||
| Questionnaire data | 0.80 | 2.8 |
| WPR data | 0.29 | |
| Upper WPR quartile (0.39–0.83) | ||
| Questionnaire data | 0.91 | 1.9 |
| WPR data | 0.49 | |
| Mouse time (proportion) | ||
| Lower WPR quartile (0.0–0.54) | ||
| Questionnaire data | 0.39 | 0.98 |
| WPR data | 0.40 | |
| Inter WPR quartile (0.54–0.74) | ||
| Questionnaire data | 0.65 | 0.98 |
| WPR data | 0.66 | |
| Upper WPR quartile (0.74–0.92) | ||
| Questionnaire data | 0.75 | 0.95 |
| WPR data | 0.79 | |
| Keyboard time (proportion) | ||
| Lower WPR quartile (0.0–0.07) | ||
| Questionnaire data | 0.23 | 4.6 |
| WPR data | 0.05 | |
| Inter WPR quartile (0.07–0.20) | ||
| Questionnaire data | 0.36 | 2.8 |
| WPR data | 0.13 | |
| Upper quartile (0.20–0.65) | ||
| Questionnaire data | 0.55 | 2.0 |
| WPR data | 0.28 |
*By low, medium and high levels of WPR‐data.