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Table 3 Comparison between pre- and post-treatment mean values of measured variables between and within groups

From: Efficacy of transcranial direct current stimulation (tDCS) on pain and shoulder range of motion in post-mastectomy pain syndrome patients: a randomized-control trial

Variables

Pre-treatment Mean ±SD

Post-treatment Mean ±SD

% of change

P value

Depression index

 Group A

26.7 ± 9

25.7 ± 9.3

3.7%

0.003*

 Group B

27.8 ± 8.1

27.4 ± 8.8

1.4%

0.172

 (pvalue)

0.721

0.604

  

VAS

 Group A

6.9 ± 1.9

4.7 ± 2.1

32%

0.001*

 Group B

6.5 ± 2.4

6.3 ± 2.2

3%

0.567

 (pvalue)

0.681

0.041*

  

Shoulder flexion

 Group A

136.3 ± 19.2

143.7 ± 19.3

4.8%

0.001*

 Group B

131.6 ± 13.6

131.5 ± 12.3

-0.07%

0.866

 (pvalue)

0.452

0.048*

  

Shoulder extension

 Group A

48.9 ± 8.6

51.6 ± 8.6

5.5%

0.002*

 Group B

47.5 ± 7.3

47.8 ± 7.1

0.6%

0.726

 (p-value)

0.632

0.195

  
  1. SD standard deviation
  2. p value probability value, *significant