Pain Research and Management / 2017 / Article / Tab 6

Research Article

The Effect of Carpal Tunnel Release on Neuropathic Pain in Carpal Tunnel Syndrome

Table 6

A comparison of the Improved, Unchanged, and Worsened groups at 12 weeks after surgery.

Improved group 
Unchanged group 
Worsened group 

Sex (male, female) ( (%))10 (38), 16 (62)29 (39), 46 (61)1 (13), 7 (87)
Age (mean ± SD)68.1 ± 8.967.2 ± 7.6
Disease duration (months) (mean ± SD)25.8 ± 37.416.3 ± 20.129.6 ± 25.3
The data before surgery
Distal latency (ms) (mean ± SD)9.6 ± 3.710.2 ± 3.510.4 ± 4.1
S-W test (mean ± SD)4.6 ± 1.34.6 ± 1.14.7 ± 1.6
MMT of APB (mean ± SD)3.8 ± 0.83.5 ± 0.93.3 ± 0.9
Tip pinch (thumb-index) (Kgf) (mean ± SD)3.4 ± 1.93.9 ± 1.63.4 ± 1.4
Tip pinch (thumb-little) (Kgf) (mean ± SD)1.0 ± 0.81.1 ± 0.61.0 ± 0.5
Grip power (Kg) (mean ± SD)15.3 ± 7.119.5 ± 9.019.6 ± 8.8
Pain score (visual analogue score (VAS))
 At entry point (mean ± SD)21.7 ± 25.029.8 ± 23.9
 Most severe pain during 4 weeks (mean ± SD)40.7 ± 35.056.9 ± 29.8
 Average pain during 4 weeks (mean ± SD)23.9 ± 25.534.8 ± 32.4
 Night pain (mean ± SD)41.8 ± 35.025.8 ± 30.714.0 ± 26.3
Night pain (existence, nonexistence) ( (%))18 (69), 8 38 (51), 37 (49)2 (25), 6 (75)
DASH score25.0 ± 17.528.5 ± 20.438.8 ± 26.5
The data at 12 weeks after surgery
Distal latency (ms) (mean ± SD)7.1 ± 3.97.9 ± 4.07.2 ± 4.1
S-W test (mean ± SD)3.8 ± 1.04.0 ± 0.93.7 ± 1.3
MMT of APB (mean ± SD)3.9 ± 0.73.8 ± 0.73.5 ± 0.8
Tip pinch (thumb-index) (Kgf) (mean ± SD)3.6 ± 1.53.9 ± 1.63.0 ± 1.3
Tip pinch (thumb-little) (Kgf) (mean ± SD)0.8 ± 0.50.8 ± 0.50.7 ± 0.4
Grip power (Kg) (mean ± SD)15.9 ± 6.216.7 ± 7.013.9 ± 5.2
Pain score (visual analogue score (VAS))
 At entry point (mean ± SD)12.2 ± 15.311.4 ± 19.128.3 ± 22.2
 Most severe pain during 4 weeks (mean ± SD)32.4 ± 28.624.6 ± 25.1ψ50.3 ± 26.6
 Average pain during 4 weeks (mean ± SD)13.5 ± 16.212.5 ± 18.726.8 ± 20.4
 Night pain (mean ± SD)33.6 ± 32.8
Night pain (existence, nonexistence) ( (%))9 (35), 17 22 (29), 53 (71)6 (75), 2 (25)
DASH score21.9 ± 19.321.7 ± 18.426.2 ± 26.4

SD: standard deviation; S-W test: Semmes-Weinstein Monofilaments test; MMT: Manual Muscle Testing; APB: abductor pollicis brevis; DASH: Disability of Arm, Shoulder, and Hand; significantly different to Unchanged group ; significantly different to Unchanged group ; significantly different to Worsened group ; significantly different to Worsened group ; calculated by test.

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