Table 4

Association between HAV exposure to rock drills and impact wrenches as separate variables and VPTs on dominant second finger: elevated VPT (dB) per 10-fold increase in days exposed to daily vibration in m/s2(A8)

FrequencyRock drill exposure: 5.4 m/s2(A8)
Dominant second finger (n=104)
Impact wrench exposure: 1.2 m/s2(A8)
Dominant second finger (n=104)
HzUnstandardised coefficient B
(95% CI)
Unstandardised coefficient B
(95% CI)
82.08 (0.96 to 3.20)*0.91 (−0.05 to 1.87)
161.96 (0.99 to 2.94)*1.03 (0.20 to 1.87)*
321.86 (0.91 to 2.81)*0.88 (0.07 to 1.69)*
642.23 (0.88 to 3.58)*1.01 (−0.15 to 2.17)
1252.65 (1.28 to 2.83)*1.27 (0.10 to 2.44)*
2503.40 (1.74 to 5.06)*1.70 (0.28 to 3.12)*
5003.36 (1.50 to 5.21)*0.74 (−0.85 to 2.33)
  • Models included age (using categories of age <60 and ages 60–69 years), rock drill exposure and impact wrench exposure.

  • *P≤0.05.

  • HAV, hand–arm vibration; VPT, vibration perception threshold.