Table 2.

Adverse effects of tDCS.

Adverse effect	Sham	Congruent	Incongruent	Kruskal-Wallis	p-value
Tingling (electrode)	2.91 (1.12)	2.96 (0.95)	2.79 (0.98)	X2(2) = 0.40	0.817
Tingling (head area)	1.35 (0.83)	1.25 (0.68)	1.17 (0.48)	X2(2) = 0.33	0.847
Fatigue	1.78 (1.13)	1.71 (1.00)	1.67 (1.01)	X2(2) = 0.04	0.980
Itching	2.13 (1.25)	2.25 (1.26)	2.04 (1.12)	X2(2) = 0.29	0.863
Headache	1.35 (0.65)	1.46 (0.83)	1.33 (0.70)	X2(2) = 0.21	0.900
Nausea	1.17 (0.58)	1.04 (0.20)	1.04 (0.20)	X2(2) = 0.69	0.709

Data are mean values of a 1–5 Likert scale with standard deviations in parentheses.