Table 4.

VAS self-report differences before and after experimental protocol.

Stimulation	Dimensions	Before (N = 24) Mean (SD)	After (N = 24) Mean (SD)	t (23)
Sham	Itching	0.39 (1.03)	1.17 (1.53)	2.27*
	Tingling	0.00 (0.00)	0.35 (0.65)	2.58*
a-tDCS	Itching	0.58 (1.38)	2.21 (2.57)	3.49**
	Tingling	0.08 (0.28)	0.79 (1.41)	2.38*
	Headache	0.46 (1.06)	0.75 (1.11)	2.07+
tRNS	Itching	0.25 (0.85)	0.88 (1.65)	1.97+
	Headache	0.63 (1.38)	1.17 (2.06)	2.18*

Visual analogue scale (VAS). We only report symptoms that present a statistically significant increase between before and after the sessions (all symptoms assessed: tiredness, anxiety, sadness, agitation, sleepiness, itching, headache, pain, tingling and metallic flavor).

⁺p < 0.10, *p < 0.05, **p < 0.01, *p < 0.001.