Table 2 Descriptive outcome values mean and standard deviation (SD) of the four intervention groups
Outcomes (Units) Mean (SD) | Sham group | 30 kHz group | 40kHz group | 50kHz group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
T0 | T1 | T2 | T3 | T0 | T1 | T2 | T3 | T0 | T1 | T2 | T3 | T0 | T1 | T2 | T3 | |
Pressure Pain Threshold (N/cm2) | 39.8 (11.1) | 40.4 (12.4) | 41.9 (14.3) | 42.0 (13.5) | 41.3 (10.7) | 48.6 (13.6) | 50.0 (13.6) | 45.1 (12.8) | 38.0 (9.4) | 48.3 (14.2) | 50.9 (14.9) | 44.3 (13.7) | 40.4 (10.5) | 47.8 (12.6) | 48.2 (13.7) | 44.5 (12.5) |
Heat Pain Threshold (ºC) | 44.2 (3.3) | 44.4 (3.4) | 44.8 (3.4) | 44.9 (3.3) | 43.6 (3.4) | 44.7 (2.9) | 45.5 (2.6) | 45.6 (2.5) | 43.5 (2.8) | 44.9 (2.8) | 45.5 (2.8) | 45.6 (2.8) | 44.5 (3.1) | 44.9 (3.4) | 45.6 (2.9) | 45.5 (3.2) |
Two-point discrimination (mm) | 2.5 (0.9) | 2.4 (0.8) | 2.4 (0.9) | 2.6 (0.9) | 2.4 (0.7) | 2.4 (0.8) | 2.3 (0.8) | 2.3 (0.8) | 2.4 (0.7) | 2.4 (0.7) | 2.5 (0.7) | 2.4 (0.8) | 2.4 (0.8) | 2.5 (0.9) | 2.4 (0.9) | 2.4 (0.9) |
Pinch Strength (Kg/f) | 5.4 (1.6) | 5.4 (1.9) | 5.4 (1.7) | 5.4 (1.5) | 5.5 (1.4) | 5.3 (1.5) | 5.4 (1.5) | 5.5 (1.5) | 5.5 (1.4) | 5.4 (1.4) | 5.4 (1.4) | 5.4 (1.4) | 5.3 (1.8) | 5.4 (1.7) | 5.1 (1.5) | 5.4 (1.5) |
SNAP amplitude (µV) | 14.6 (9.3) | 16.3 (10.5) | 16.8 (10.8) | 16.9 (10.8) | 17.2 (11.4) | 20.0 (13.9) | 19.8 (12.7) | 23.2 (17.7) | 18.8 (12.4) | 22.4 (21.5) | 22.5 (28.1) | 22.9 (28.0) | 18.6 (15.5) | 21.4 (14.2) | 21.3 (21.2) | 21.7 (18.5) |
SNAP velocity (m/s) | 45.9 (4.2) | 45.1 (4.2) | 45.0 (4.4) | 44.6 (4.5) | 44.7 (5.7) | 44.2 (5.2) | 44.2 (5.4) | 44.0 (5.7) | 45.3 (4.1) | 44.4 (4.0) | 44.6 (4.0) | 44.0 (4.4) | 45.4 (4.8) | 45.0 (4.8) | 45.3 (4.7) | 45.0 (4.9) |
Skin temperature (ºC) | 31.6 (4.0) | 31.3 (4.4) | 31.1 (4.4) | 30.6 (4.4) | 30.4 (3.8) | 30.5 (4.1) | 30.3 (4.1) | 29.9 (4.1) | 31.0 (3.9) | 30.5 (4.0) | 30.3 (4.2) | 29.7 (4.1) | 31.9 (3.0) | 31.7 (3.1) | 31.6 (3.3) | 31.1 (3.3) |