. Author manuscript; available in PMC: 2016 Nov 1.

Published in final edited form as: Obesity (Silver Spring). 2015 Nov;23(11):2149–2156. doi: 10.1002/oby.21313

Table 3.

Side effects during Study 1 and Study 2

		Study 1		Study 2

		Sham	Active	Sham	Active
Scalp Burn	Absent	11 (92%)	9 (60%)	11 (92%)	12 (80%)
Scalp Burn	Present	1 (8%)	6 (40%)	1 (8%)	3 (20%)

Tingling	Absent	12 (100%)	12 (80%)	12 (100%)	14 (93%)
Tingling	Present	0 (0%)	3 (20%)	0 (0%)	1 (7%)

Skin Redness	Absent	12 (100%)	6 (40%)	11 (92%)	6 (40%)
Skin Redness	Present	0 (0%)	9 (60%)^*	1 (8%)	9 (60%)^*

Sleepiness	Absent	11 (92%)	11 (79%)	12 (100%)	12 (80%)
Sleepiness	Present	1 (8%)	3 (21%)	0 (0%)	3 (20%)

Trouble Concentrating	Absent	12 (100%)	15 (100%)	12 (100%)	14 (93%)
Trouble Concentrating	Present	0 (0%)	0 (0%)	0 (0%)	1 (7%)

Mood Change	Absent	11 (92%)	15 (100%)	12 (100%)	15 (100%)
Mood Change	Present	1 (8%)	0 (0%)	0 (0%)	0 (0%)

Headache	Absent	12 (100%)	15 (100%)	12 (100%)	15 (100%)
Headache	Present	0 (0%)	0 (0%)	0 (0%)	0 (0%)

Neck pain	Absent	12 (100%)	15 (100%)	12 (100%)	15 (100%)
Neck pain	Present	0 (0%)	0 (0%)	0 (0%)	0 (0%)

Scalp Pain	Absent	12 (100%)	15 (100%)	12 (100%)	15 (100%)
Scalp Pain	Present	0 (0%)	0 (0%)	0 (0%)	0 (0%)

Trouble concentrating	Absent	12 (100%)	15 (100%)	14 (93%)	14 (93%)
Trouble concentrating	Present	0 (0%)	0 (0%)	1 (7%)	1 (7%)

Data reported as the total number of side effects reported during the three days of stimulation.

The active group had a higher prevalence of skin redness at both visits as compared to the sham group (60% vs. 4%, Fischer’s Exact Test, 0 < 0.05).

Symptoms are listed exactly as asked on the questionnaire and thus reflected the subjects’ subjective interpretation. True “burns” were not observed by the investigators.