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Table 1 Changes in mechanical detection (mN) and pressure pain threshold (N/cm2)

From: 20-kHz alternating current stimulation: effects on motor and somatosensory thresholds

 

Intervention

0 min

15 min

20 min

30 min

Significance intragroup (a)

Mechanical Detection Threshold

20 kHz

0.25 (0.25–0.25)

0.25 (0.25–2.00)

0.25 (0.25–0.25)

0.25 (0.25–0.25)

χ2: 12,75; p < 0.01

SHAM

0.25 (0.25–0.25)

0.25 (0.25–0.25)

0.25 (0.25–0.25)

0.25 (0.25–0.25)

χ2: 0,00; p = 1.00

 

Significance intergroup (b)

p = 1.00

p = 0.02

p = 0.36

p = 1.00

 

Pressure Pain Threshold (c)

20 kHz

70.0 (4.3)

69.8 (4.2)

70.5 (4.9)

68.9 (4.8)

“Time” factor:

F: 0.54; p = 0.66

“Intervention” factor: F: 0.26; p = 0.62

SHAM

69.0 (4.6)

70.0 (5.2)

67.3 (4.9)

68.5 (5.2)

  1. Data of Mechanical Detection Threshold are expressed as median values (25–75% inter-quartile range), and data of Pressure Pain Threshold as mean value (standard error). (a)Friedman test. (b) Mann-Whitney test. (c) Two-way ANOVA repeated measures