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 ± 8.9
67.2 ± 7.6
Disease duration (months) (mean ± SD)
25.8 ± 37.4
16.3 ± 20.1
29.6 ± 25.3
The data before surgery
Distal latency (ms) (mean ± SD)
9.6 ± 3.7
10.2 ± 3.5
10.4 ± 4.1
S-W test (mean ± SD)
4.6 ± 1.3
4.6 ± 1.1
4.7 ± 1.6
MMT of APB (mean ± SD)
3.8 ± 0.8
3.5 ± 0.9
3.3 ± 0.9
Tip pinch (thumb-index) (Kgf) (mean ± SD)
3.4 ± 1.9
3.9 ± 1.6
3.4 ± 1.4
Tip pinch (thumb-little) (Kgf) (mean ± SD)
1.0 ± 0.8
1.1 ± 0.6
1.0 ± 0.5
Grip power (Kg) (mean ± SD)
15.3 ± 7.1
19.5 ± 9.0
19.6 ± 8.8
Pain score (visual analogue score (VAS))
At entry point (mean ± SD)
21.7 ± 25.0
29.8 ± 23.9
Most severe pain during 4 weeks (mean ± SD)
40.7 ± 35.0
56.9 ± 29.8
Average pain during 4 weeks (mean ± SD)
23.9 ± 25.5
34.8 ± 32.4
Night pain (mean ± SD)
41.8 ± 35.0
25.8 ± 30.7
14.0 ± 26.3
Night pain (existence, nonexistence) ( (%))
18 (69), 8
38 (51), 37 (49)
2 (25), 6 (75)
DASH score
25.0 ± 17.5
28.5 ± 20.4
38.8 ± 26.5
The data at 12 weeks after surgery
Distal latency (ms) (mean ± SD)
7.1 ± 3.9
7.9 ± 4.0
7.2 ± 4.1
S-W test (mean ± SD)
3.8 ± 1.0
4.0 ± 0.9
3.7 ± 1.3
MMT of APB (mean ± SD)
3.9 ± 0.7
3.8 ± 0.7
3.5 ± 0.8
Tip pinch (thumb-index) (Kgf) (mean ± SD)
3.6 ± 1.5
3.9 ± 1.6
3.0 ± 1.3
Tip pinch (thumb-little) (Kgf) (mean ± SD)
0.8 ± 0.5
0.8 ± 0.5
0.7 ± 0.4
Grip power (Kg) (mean ± SD)
15.9 ± 6.2
16.7 ± 7.0
13.9 ± 5.2
Pain score (visual analogue score (VAS))
At entry point (mean ± SD)
12.2 ± 15.3
11.4 ± 19.1
28.3 ± 22.2
Most severe pain during 4 weeks (mean ± SD)
32.4 ± 28.6
24.6 ± 25.1ψ
50.3 ± 26.6
Average pain during 4 weeks (mean ± SD)
13.5 ± 16.2
12.5 ± 18.7
26.8 ± 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 score
21.9 ± 19.3
21.7 ± 18.4
26.2 ± 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.
