Table 4
Ratio of reported to observed durations of exposure to sources of vibration
| Source of exposure | Subjects4-150 (n) |
Ratio of reported to observed duration of exposure | |||
|---|---|---|---|---|---|
| Median | (Interquartile range) | ||||
| Impact screwdriver | 7 | 4.0 | (3.7–17.5) | ||
| Nut runner | 8 | 3.0 | (1.7–8.6) | ||
| Nailing or stapling gun | 11 | 4.6 | (2.3–6.9) | ||
| Hammer drill | 6 | 2.7 | (2.0–9.7) | ||
| Hand held sander | 8 | 6.3 | (3.4–7.6) | ||
| Impact wrench | 5 | 5.6 | (3.0–10.0) | ||
| Jig saw | 8 | 3.5 | (1.8–8.2) | ||
| Hand held portable grinder | 11 | 2.1 | (1.2–6.3) | ||
| Hand guided mower | 10 | 1.2 | (0.8–2.0) | ||
| Floor polisher | 13 | 1.6 | (1.4–1.9) | ||
| Any source of hand transmitted vibration | 104 | 2.5 | (1.6–5.9) | ||
| Van | 6 | 1.2 | (1.1–1.2) | ||
| Bus or coach | 12 | 1.1 | (1.0–1.2) | ||
| Tractor | 8 | 1.1 | (1.0–1.1) | ||
| Fork lift truck | 24 | 1.0 | (0.9–1.2) | ||
| Lorry | 7 | 1.2 | (1.0–1.5) | ||
| Any source of whole body vibration | 62 | 1.1 | (1.0–1.2) | ||
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↵4-150 Analysis was restricted to subjects whose report of exposure was confirmed by observation.
