TABLE 2.

Frequency and discomfort of adverse effects. Median values and interquartile ranges of discomfort are presented.

Adverse effect	tRNS (n = 30)		tDCS (n = 30)		Sham (n = 30)
	Frequency	Discomfort	Frequency	Discomfort	Frequency	Discomfort
Tingling	2 (7%)	0 (0–3)	19 (63%)	2.5 (0–9)	23 (77%)	4 (0–7)
Itching	1 (3%)	0 (0–1)	8 (27%)	0 (0–8)	6 (20%)	0 (0–10)
Burning	0 (0%)	0 (0–0)	2 (7%)	0 (0–4)	2 (7%)	0 (0–7)
Other	2 (7%)	0 (0–3)	1 (3%)	0 (0–3)	1 (3%)	0 (0–2)

tRNS, transcranial random noise stimulation; tDCS, transcranial direct current stimulation. Median values and ranges are presented.