Table 2.
Summary of baseline biomechanical and work psychosocial exposures.
| N | Mean (SD) | |
|---|---|---|
| FORCE MEASURES | ||
| Peak Borg CR-10: Worker’s rating (0 to 10 scale) | 346 | 3.9 (2.2) |
| Peak Borg CR-10: Analyst’s rating (0 to 10 scale) | 365 | 3.0 (1.7) |
| REPETITION MEASURES | ||
| Hand Activity Level (HAL) Scale: Analyst’s rating (0 to 10 scale) | 367 | 4.9 (1.7) |
| Total Repetition Rate* (reps/min) | 363 | 21.6 (15.7) |
| Forceful Repetition Rate* (reps/min) | 363 | 7.7 (10.1) |
| DUTY CYCLE | ||
| % Duration All Exertions* (0% to 100%) | 363 | 67.1 (18.4) |
| % Duration Forceful Exertions* (0% to 100%) | 363 | 22.4 (19.4) |
| POSTURE MEASURES | ||
| % Time ≥30°Wrist Flexion* (0% to 100%) | 360 | 4.2 (9.1) |
| % Time≥30°Wrist Extension* (0% to 100%) | 360 | 13.8 (20.6) |
| WORK PSYCHOSOCIAL MEASURES | ||
| Psychological DemandƗ | 182 | 31.9 (4.9) |
| Decision LatitudeƗ | 180 | 60.0 (8.5) |
| OTHER MEASURES | N | % |
| Vibration | ||
| None | 190 | 54.6 |
| Some | 158 | 45.4 |
| 2018 ACGIH TLV for Hand Activity | ||
| Lower Tertile (< PFIAL) | 72 | 19.8 |
| Middle Tertile (≥ PFIAL & < PFITLV) | 86 | 23.7 |
| Upper Tertile (≥ PFITLV) | 205 | 56.5 |
*
Direct measurements and/or from videotape analyses.
Ɨ
Domain of the Karasek Job Strain Index