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Table 2 Comparison of pre-treatment and post-treatment values of outcome variables in each group

From: Comparison of single-dose radial extracorporeal shock wave and local corticosteroid injection for treatment of carpal tunnel syndrome including mid-term efficacy: a prospective randomized controlled trial

   rESWTa (n = 13) LCsIb (n = 12)
Outcome variable Follow-up sessions Mean +/− SD p value Mean +/− SD p value
Visual analogue scale Baseline 2.4 +/−  2.5   2.6 +/−  2.0  
Week 1 1.3 +/−  2.0 0.18 1.6 +/−  1.7 0.08
Week 4 1.3 +/−  1.9 0.15 1.4 +/−  1.5 0.08
Week 12 0.65 +/− 1.2 0.022* 1.9 +/− 2.7 0.52
Week 24 0.35 +/− 0.81c 0.0075* 1.7 +/− 2.1 0.19
Symptom severity score Baseline 21 +/− 6.4   22 +/− 5.1  
Week 1 19 +/− 7.4 0.33 17 +/− 4.5 0.0047*
Week 4 17 +/−  4.3 0.031* 17 +/−  5.1 0.011*
Week 12 15 +/− 4.5 0.0082* 18 +/− 5.5 0.13
Week 24 13 +/− 2.9c 0.0059* 19 +/− 7.9 0.20
Functional score Baseline 14 +/− 3.2   12 +/− 4.1  
Week 1 13 +/− 4.2 0.27 11 +/− 3.2 0.31
Week 4 13 +/−  3.5 0.12 11 +/−  3.3 0.39
Week 12 11 +/− 3.0 0.0065* 10 +/− 3.4 0.19
Week 24 11 +/− 2.2c 0.0073* 13 +/− 7.0 0.65
Boston questionnaire score Baseline 35 +/− 8.5   34 +/− 8.5  
Week 1 32 +/− 10 0.28 28 +/− 7.0 0.037*
Week 4 30 +/− 7.1 0.032* 28 +/− 8.0 0.05
Week 12 26 +/− 6.8 0.0040* 29 +/− 8.2 0.13
Week 24 24 +/− 4.7c 0.0037* 32 +/− 14 0.47
Peak sensory distal latency Baseline 4.5 +/− 0.72   3.7 +/− 1.3  
Week 12 4.1 +/− 0.74d 0.0047* 3.6 +/− 1.3 0.026*
SNAPe amplitude Baseline 17 +/− 6.9   18 +/− 11  
Week 12 18 +/− 6.5d 0.66 21 +/− 12 0.28
Motor distal latency Baseline 4.5 +/− 0.35   4.7 +/−  0.90  
Week 12 4.2 +/− 0.42d 0.084 4.4 +/− 0.75 0.06
CMAPf amplitude Baseline 6.9 +/− 1.5   6.0 +/− 0.61  
Week 12 6.9 +/− 1.6d 0.91 6.5 +/− 1.2 0.20
  1. *p < 0.05
  2. arESWT = Radial extracorporeal shockwave therapy
  3. bLCsI = Local corticosteroid injection
  4. cn = 11
  5. dn = 10
  6. eSNAP = Sensory nerve action potential
  7. fCMAP = Compound muscle action potential