Table 2 Exposure distributions in 103 observed work task groups and in 2033 subjects with repetitive work.
| Exposure variable | Distribution characteristics of observed work tasks (n = 103) | Distribution of the time weighted and summed exposure variables for subjects with repetitive work (n = 2033) | ||||
|---|---|---|---|---|---|---|
| Mean of medians (SD) | Min‐max | Within vs between variation* | Number with no exposure, n (%) | Median | 90th percentile | |
| Position, % of cycle time | ||||||
| Non‐neutral position (>15° flexion or extension, >5° radial or >10° ulnar deviation) | 73.7 (8.8) | 0.8–100 | 0.37 | 396 (20) | 21.7 | 64.1 |
| Repetitions, n/min | ||||||
| Wrist movements | 16.0 (5.0) | 2.3–62.0 | 0.64 | 0 (0) | 12.5 | 24.1 |
| Force, rating units 1–5 | 2.0 (0.0) | 1.0–4.5 | 0.29 | 0 (0) | 1 | 3 |
*Within work task variation (estimated as the mean of work task specific standard deviations) divided by between work task variation (standard deviation of the medians of work tasks).