Table 4 Side effects reported during the intervention.

From: Cortical excitability and analgesic effects of multisite transcranial direct current stimulation targeting the motor cortex and cerebellum in fibromyalgia

Severity of symptoms (%)

 

Group

Absent

Mild

Moderate

Severe

P-value

Itching

s-tDCS M1+ CB

43%

48%

9%

0%

0.49

a-tDCS CB + M1

55%

32%

14%

0%

a-tDCS CB

52%

26%

13%

9%

a-tDCS M1

57%

30%

13%

0%

Burning

s-tDCS M1+ CB

43%

52%

4%

0%

0.11

a-tDCS CB + M1

59%

41%

0%

0%

a-tDCS CB

48%

35%

17%

0%

a-tDCS M1

61%

39%

0%

0%

Tingling

s-tDCS M1+ CB

65%

35%

0%

0%

0.78

a-tDCS CB + M1

55%

41%

5%

0%

a-tDCS CB

57%

30%

9%

4%

a-tDCS M1

57%

39%

4%

0%

Redness

s-tDCS M1+ CB

70%

30%

0%

0%

0.38

a-tDCS CB + M1

68%

27%

5%

0%

a-tDCS CB

61%

22%

17%

0%

a-tDCS M1

70%

26%

4%

0%

Drowsiness

s-tDCS M1+ CB

78%

22%

0%

0%

0.69

a-tDCS CB + M1

77%

18%

5%

0%

a-tDCS CB

87%

9%

0%

4%

a-tDCS M1

78.3%

17.4%

4.3%

0%

  1. Data are presented as percentages (%), with incidence and severity classified as absent, mild, moderate, or severe (n = 91).
  2. a-tDCS anodal transcranial direct current stimulation, s-tDCS sham stimulation, M1 primary motor cortex, CB cerebellum.
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