Table 2 Physical exposure at the job level (measurements/observations in the field (m) and from videotape analysis (v))
From: Study protocol title: a prospective cohort study of low back pain
| Variable | Analyst | Worker |
|---|---|---|
| Cycle Time (min) | • SI definition (v) | |
| Force | • DUE force rating each job | • DUE force rating each job (Borg CR-10) |
| o Peak force (m) | o Peak force (m) | |
| o Typical force (m) | o Typical force (m) | |
| • Overall DUE expert force rating1 (v) | • Matching force | |
| • Object/tool weight and Center mass offset (m) | o Grip force (m) | |
| • Pushing/pulling force (m) | o Pinch force (m) | |
| o Thrust force (m) | ||
| Repetition | • HAL Rating (v) | |
| • No. of exertions/min (SI) (v) | ||
| • No. exertions/minute at each force level2 (v) | ||
| • Speed of work (SI) (v) | ||
| %Duration of Exertion | • % Duration of exertion (SI) (v) | |
| • Duration per exertion for each force level (s/exertion) (v) | ||
| Exposure/day (hours) | • Worker interview(m) | |
| Hand/wrist Posture | • Posture categories3 | |
| o Wrist flexion: <30°, 30°-50°, >50° (v) | ||
| o Wrist extension: <30°, 30°-50°, >50° (v) | ||
| o Ulnar deviation: <10°, 10°-25°, >25° (v) | ||
| o Radial deviation: <5°, 5°-25° (v) | ||
| • No. of exertions in each category (v) | ||
| • % of cycle time in each category (v) | ||
| • Peak force posture categories (v) | ||
| • Hand/wrist posture each task (SI) (v) | ||
| • Overall SI posture (v) | ||
| Elbow Posture/Forearm Rotation | • Extension < 70° and > 135° | |
| o No. of exertions (v) | ||
| o % cycle time (v) | ||
| • Forearm rotation | ||
| o (Neutral, prone, supine) (v) | ||
| o % of cycle time with forearm rotation > 45° from neutral (v) | ||
| Grip/pinch | • Type of grasp/pinch4 (v) | |
| • Grip/pinch span (v) | ||
| • % cycle time in each type of grasp/pinch (v) | ||
| Localized Mechanical Compression | • Body part | |
| • Category (Negligible, moderate, severe) (m) | ||
| • No. of exertions (v) | ||
| • % of cycle time (v) | ||
| Hand as hammer | • Category (Negligible, moderate, severe) (m) | |
| • No. of exertions (v) |