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Total incidence of side effects and their severity in 110 home-based tDCS sessions.
| Side effect | Mild | Moderate | Severe | Percentage of sessions |
| Headache | 0 | 0 | 0 | 0 |
| Neck pain | 34* | 0 | 0 | 29.82 |
| Scalp pain | 0 | 0 | 0 | 0 |
| Sensations under electrodes | 21 | 0 | 0 | 18.42 |
| Sleepiness | 4 | 0 | 0 | 3.51 |
| Scalp burn | 0 | 0 | 0 | 0 |
| Scalp redness | 1 | 0 | 0 | 0.88 |
| Increase in suicidality | 0 | 0 | 0 | 0 |
*All responses derived from MDD04.
