Table 2.

Means and SDs of reported tDCS side effects

		active tDCS	Sham tDCS	t	df	p-value*
		M(SD)	M(SD)
Reported side effect	Skin redness	0.32 (1.003)	0.11 (0.32)	0.84	21.88	0.408
	Sleep problem	0.32 (1.15)	0.0 (0.0)	1.18	18.00	0.25
	Fatigue	0.26 (1.14)	0.11 (0.47)	0.53	24.17	0.599
	Pain	0.21 (0.53)	0.17 (0.38)	0.28	32.64	0.775
	Burning	1.32 (1.63)	0.44 (0.705)	2.12	24.74	0.044
	Itching	0.84 (1.25)	0.56 (0.85)	0.81	31.82	0.422
	Tingling	1.05 (1.35)	1 (0.907)	0.14	31.60	0.890

Values are presented as means ± standard deviation (SD). Note: each value represents the average of side effects reported during all 10 tDCS sessions. tDCS = transcranial Direct Current Stimulation; M = Mean; SD = Standard Deviation; * = between-group differences of side effect items were explored by independent samples t-tests. Significant results are highlighted (p ≤ 0.05) in bold