Pain Research and Management / 2017 / Article / Tab 5

Research Article

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

Table 5

The relationship between the painDETECT scores at 12 weeks after surgery and clinical characteristics.

painDETECT (score) (number of hands)Unlikely NP
(≤12)
Possible NP
(13–38)
Likely NP
(≥19)

Sex (male, female) ( [%])32 (36), 57 (64)6 (50), 6 (50)2 (25), 6 (75)
Age (mean ± SD)69.9 ± 9.765.3 ± 7.167.9 ± 6.6
Disease duration, months (mean ± SD)19.5 ± 26.425.1 ± 25.012.1 ± 19.5
The data before surgery
Distal latency, msec (mean ± SD)9.9 ± 3.510.5 ± 3.611.5 ± 4.0
S-W test (mean ± SD)4.5 ± 1.15.2 ± 1.34.7 ± 1.6
MMT of APB (mean ± SD)3.6 ± 0.93.4 ± 0.83.1 ± 1.0
Tip pinch (thumb-index), Kgf (mean ± SD)3.9 ± 1.73.2 ± 1.52.9 ± 1.9
Tip pinch (thumb-little), Kgf (mean ± SD)1.1 ± 0.60.9 ± 0.50.8 ± 0.5
Grip power, Kg (mean ± SD)19.0 ± 8.815.6 ± 6.918.1 ± 10.1
Pain score ( VAS)
 At entry (mean ± SD)25.5 ± 27.542.4 ± 29.337.5 ± 23.1
 Most severe pain during 4 weeks (mean ± SD)46.2 ± 36.368.1 ± 16.956.1 ± 28.1
 Average pain during 4 weeks (mean ± SD)51.6 ± 26.335.0 ± 29.7
 Night pain (mean ± SD)27.9 ± 31.839.1 ± 35.323.4 ± 33.1
Night pain (existence, nonexistence) ( [%])47 (53), 42 (47)8 (67), 4 (33)3 (38), 5 (62)
DASH score (mean ± SD)28.7 ± 20.927.6 ± 18.826.5 ± 18.1
The data at 12 weeks after surgery
Distal latency, msec (mean ± SD)7.6 ± 4.07.0 ± 4.19.3 ± 3.9
S-W test (mean ± SD)3.9 ± 1.04.0 ± 1.03.8 ± 1.3
MMT of APB (mean ± SD)3.8 ± 0.73.8 ± 0.63.5 ± 0.5
Tip pinch (thumb-index), Kgf (mean ± SD)2.7 ± 1.62.6 ± 1.6
Tip pinch (thumb-little), Kgf (mean ± SD)0.8 ± 0.50.6 ± 0.20.5 ± 0.4
Grip power, Kg (mean ± SD)17.0 ± 6.912.7 ± 4.414.1 ± 5.7
Pain score ( VAS)
 At entry (mean ± SD)41.3 ± 24.332.1 ± 22.1
 Most severe pain during 4 weeks (mean ± SD)63.2 ± 25.648.0 ± 18.7
 Average pain during 4 weeks (mean ± SD)41.9 ± 22.431.4 ± 20.2
 Night pain (mean ± SD)35.6 ± 36.128.6 ± 21.3
Night pain (existence, nonexistence) ( [%])22 (25), 67 7 (58), 5 (42)7 (88), 1 (12)
DASH score (mean ± SD)22.2 ± 18.918.5 ± 16.425.7 ± 25.9

NP: neuropathic pain; SD: standard deviation; S-W test: Semmes-Weinstein Monofilaments test; MMT: Manual Muscle Testing; APB: abductor pollicis brevis; VAS: visual analogue scale; DASH: Disability of Arm, Shoulder, and Hand; significantly different to Possible NP ; significantly different to Possible NP ; significantly different to Likely NP ; significantly different to Likely NP ; calculated by test.

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