Vibration exposure information for all subjects
| Vibration exposure | n (%) | Mean (SD) | Minimum | Maximum |
|---|---|---|---|---|
| Type of tool, n (%) | ||||
| Impact wrench | 109 (63.7) | |||
| Chainsaw | 33 (19.3) | |||
| Concrete breaker | 15 (8.8) | |||
| Others | 14 (8.2) | |||
| Daily 8-hour time weight average vibration exposure, A(8) (ms−2) | 3.64 (3.95) | 0.09 | 23.31 | |
| Daily duration of vibration exposure (hours/day) | 2.69 (1.99) | 0.02 | 10.83 | |
| Yearly frequency of vibration exposure (days/year) | 222.2 (68.6) | 12.0 | 365.0 | |
| Total duration of vibration exposure (years) | 7.84 (5.47) | 0.17 | 30.00 | |
| Log lifetime vibration dose (ln m2 s−4) | 17.74 (2.74) | 10.72 | 23.80 | |
| First quartile (Q1: <16) | 53 (31.0) | |||
| Middle quartiles (Q2–Q3: 16–20) | 81 (47.4) | |||
| Last quartile (Q4: ≥20) | 37 (21.6) | |||
| Log total operating time (ln hours) | 7.63 (1.66) | 1.38 | 10.99 | |
| First quartile (Q1: <6.5) | 36 (21.1) | |||
| Middle quartiles (Q2–Q3: 6.5–8.5) | 72 (42.1) | |||
| Last quartile (Q4: ≥ 8.5) | 63 (36.8) | |||
| Log cumulative exposure index (ln m2 s−4) | 8.59 (2.22) | 2.98 | 13.73 | |
| First quartile (Q1: <7) | 40 (23.4) | |||
| Middle quartiles (Q2–Q3 : 7–10) | 79 (46.2) | |||
| Last quartile (Q4: ≥10) | 52 (30.4) | |||