Table 2.
Results from the neurosensory testing of vibration exposed and unexposed workers
| Variables | 2018 | 2022 | N = 11 | 2018 | 2022 | N = 24 |
|---|---|---|---|---|---|---|
| Mean ± SD | Mean ± SD | p-values | Mean ± SD | Mean ± SD | p-values | |
| 2PD dig 2 R | 4.6 ± 1.0 | 4.9 ± 1.1 | NS | 4.1 ± 0.3 | 4.5 ± 0.9 | NS |
| 2PD dig 5 R | 5.3 ± 1.5 | 5.3 ± 1.0 | NS | 4.1 ± 0.6 | 5.1 ± 1.1 | NS |
| 2PD dig 2 L | 4.6 ± 1.0 | 4.7 ± 0.9 | NS | 4.0 ± 0.0 | 4.3 ± 0.7 | NS |
| 2PD dig 5 L | 4.8 ± 1.1 | 5.1 ± 1.2 | NS | 4.0 ± 0.2 | 4.8 ± 0.8 | NS |
| Mono dig 2 R | 3.6 ± 0.6 | 3.5 ± 0.7 | NS | 3.3 ± 0.4 | 3.2 ± 0.5 | NS |
| Mono dig 5 R | 3.8 ± 1.1 | 3.7 ± 1.2 | NS | 3.1 ± 0.4 | 3.1 ± 0.5 | NS |
| Mono dig 2 L | 3.7 ± 1.1 | 3.5 ± 0.7 | NS | 3.3 ± 0.5 | 3.2 ± 0.5 | NS |
| Mono dig 5 L | 3.6 ± 0.5 | 3.5 ± 1.2 | NS | 3.2 ± 0.4 | 3.1 ± 0.5 | NS |
| Temp dig 2 Rw | 0.3 ± 0.5 | 0.4 ± 0.5 | NS | 0.2 ± 0.4 | 0.5 ± 0.5 | 0.021 |
| Temp dig 2 Rc | 0.4 ± 0.5 | 0.6 ± 0.5 | NS | 0.1 ± 0.4 | 0.6 ± 0.5 | < 0.001 |
| Temp dig 5 RwW | 0.5 ± 0.5 | 0.4 ± 0.5 | NS | 0.3 ± 0.5 | 0.5 ± 0.5 | NS |
| Temp dig 5 RcC | 0.4 ± 0.5 | 0.6 ± 0.5 | NS | 0.3 ± 0.5 | 0.7 ± 0.5 | 0.039 |
| Temp dig 2 LwW | 0.2 ± 0.4 | 0.4 ± 0.5 | NS | 0.1 ± 0.3 | 0.5 ± 0.5 | 0.002 |
| Temp dig 2 LcC | 0.1 ± 0.3 | 0.6 ± 0.5 | 0,031 | 0.1 ± 0.3 | 0.5 ± 0.5 | 0.039 |
| Temp dig 5 LwW | 0.3 ± 0.5 | 0.5 ± 0.5 | NS | 0.1 ± 0.3 | 0.5 ± 0.5 | 0.021 |
| Temp dig 5 Lc-C | 0.2 ± 0.4 | 0.6 ± 0.5 | NS | 0.2 ± 0.4 | 0.6 ± 0.5 | 0.003 |
| Vibb dig 2 R | 0.75 ± 0.43 | 0.73 ± 0.28 | NS | 1.09 ± 0.16 | 0.91 ± 0.16 | < 0.001 |
| Vibb dig 5 R | 0.66 ± 0.43 | 0.68 ± 0.30 | NS | 1.04 ± 0.18 | 0.84 ± 0.18 | < 0.001 |
| Vibb dig 2 L | 0.74 ± 0.40 | 0.77 ± 0.38 | NS | 1.12 ± 0.17 | 0.96 ± 0.15 | < 0.001 |
| Vibb dig 5 L | 0.70 ± 0.40 | 0.62 ± 0.37 | NS | 1.06 ± 0.17 | 0.86 ± 0.19 | < 0.001 |
| Jamar LH | 36 ± 9 | 38 ± 13 | NS | 46 ± 14 | 46 ± 14 | NS |
| Jamar RH | 38 ± 8 | 38 ± 10 | NS | 47 ± 15 | 48 ± 13 | NS |
| Needle dig 2 R | 0.5 ± 0.5 | 0.5 ± 0.5 | NS | 0.04 ± 0.20 | 0.6 ± 0.5 | < 0.001 |
| Needle dig 5 R | 0.4 ± 0.5 | 0.5 ± 0.5 | NS | 0.08 ± 0.28 | 0.3 ± 0.5 | 0.031 |
| Needle dig 2 L | 0.5 ± 0.5 | 0.5 ± 0.5 | NS | 0.04 ± 0.20 | 0.6 ± 0.5 | < 0.001 |
| Needle dig 5 L | 0.4 ± 0.5 | 0.5 ± 0.5 | NS | 0.04 ± 0.20 | 0.4 ± 0.5 | 0.008 |
| SWS VWF R | 1.00 ± 1.00 | 1.27 ± 1.27 | NS | 0.42 ± 0.78 | 0.38 ± 0.71 | NS |
| SWS VWF L | 1.00 ± 1.00 | 1.27 ± 1.27 | NS | 0.42 ± 0.78 | 0.54 ± 0.83 | NS |
| SWS N-sens R | 1.64 ± 1.03 | 1.45 ± 1.29 | NS | 0.88 ± 0.74 | 1.00 ± 0.89 | NS |
| SWS N-sens L | 1.64 ± 1.03 | 1.45 ± 1.29 | NS | 0.79 ± 0.78 | 0.96 ± 0.91 | NS |
Table 2. Values in vibration exposed workers (N = 24) and in unexposed workers (N = 11) in 2018 and 2022. P-values from repeated measurements of values 2018 vs. 2022 within the same group. The following variables were determined: 2-PD – 2 point discrimination in mm; Mono = Semmes Weinstein’s monofilament test (0.07 g, 0.2 g, 2 g, 4 g, 300 g); Temp = Temperature sensitivity measured by Rolltemp II
(0 = normal; 1 = deviant response), Vib –vibration perception thresholds (VPT) expressed as Sensibility Index (SI < 0.8 is deviant; SI ≥ 0.8 is normal.), Needle = needle tests, is a sharp needle experienced as sharp or blunt (0 = sharp; 1 blunt, deviant); Classification of VWF as 0 to 4 and classification of neuropathy as 0 SN to 3 SN according to the Stockholm Workshop Scale. Jamar (kg). R = right hand: L = left hand. VWF = vibration white finger. c = cold, w = warmth