Table 4. Adverse effects (AEs) of the sham transcranial direct current stimulation (n=15).
| Effects | Total,
n (%) |
Mild,
n (%) |
Moderate,
n (%) |
Significant,
n (%) |
Very high,
n (%) |
Site of
AE a |
|---|---|---|---|---|---|---|
| Itching | 8 (53.3%) | 7 (87.5%) | 1 (12.5%) | 0 | 0 | C |
| Tingling | 7 (46.6%) | 6 (85.7%) | 1 (14.3%) | 0 | 0 | C |
| Scalp Pain | 1 (6.6%) | 1(100%) | 0 | 0 | 0 | A |
| Burning | 2 (13.3%) | 1 (50%) | 1 (50%) | 0 | 0 | C |
| Vertigo | 0 | 0 | 0 | 0 | 0 | NA |
| Pinching | 3 (20%) | 2 (75%) | 1 (25%) | 0 | 0 | C |
| Metallic/iron
taste |
0 | 0 | 0 | 0 | 0 | NA |
| Fatigue | 1 (66.6%) | 1 (100%) | 0 | 0 | 0 | NA |
| hypomania | 0 | 0 | 0 | 0 | 0 | NA |
| Heat | 0 | 0 | 0 | 0 | 0 | NA |
| headache | 2 (13.3%) | 2 (100%) | 0 | 0 | 0 | NA |
| Skin irritation | 5 (33.3%) | 5 (100%) | 0 | 0 | 0 | A |
| Dizziness | 0 | 0 | 0 | 0 | 0 | NA |
| Discomfort | 5 (33.3%) | 4 (80%) | 1 (20%) | 0 | 0 | NA |
| Tolerability | ||||||
| Very high | 14 (93.3%) | NA | NA | NA | NA | NA |
| Moderate | 2 (13.3%) | NA | NA | NA | NA | NA |
| Mild | 1 (6.6%) | NA | NA | NA | NA | NA |
| None | 0 | NA | NA | NA | NA | NA |
aC:under cathode, A:under anode, C-A: between cathode and anode; very high tolerability indicates the subject could easily tolerate the tDCS sessions.