Intervention Effect of High-Definition Transcranial Alternating Current Stimulation (HD-tACS) on Non-suicidal Self-injury (NSSI)

Changes in the number, frequency, and impulsivity of self-injurious behaviors

Adolescent Non-suicidal self-injury Assessment Questionnaire consisted of 2 dimensions and 12 items, with 5 options for each item, namely, "none, occasional, sometimes, often, and always", and was scored on a 5-point Likert scale from 0 to 4. The score for each item was summed up as the total score of the questionnaire, and the total mean score was divided by the number of items. The total mean score was divided by the number of items, and the higher the total mean score, the more serious the patients' non-suicidal Likert 5 self-injurious behaviors were.

Change in Hamilton Depression Rating Scale (HAMD) Score

The HAMD is a clinician-administered depression assessment and consists of 17 items with a total score range from 0 to 54. A higher score indicates a worse outcome.

Change in Hamilton Anxiety Scale (HAMA) Score

The HAMA is a 14-item scale to measure the severity of anxiety symptoms, where each item is rated on a scale from 0 to 4. The HAMA total score ranges from 0 to 56, with lower scores indicating less anxiety symptoms.

Change in Patient Health Questionnaire-15 (PHQ-15) Score

The PHQ-15 is a 15-item scale to measure the severity of somatic symptoms, where each item is rated on a scale from 0 to 2. The PHQ-15 total score ranges from 0 to 30, with lower scores indicating less somatic symptoms.