Evidence-based Digital CBT for Nonsuicidal Self-Injury

Ottawa Self-injury Inventory（OSI）

Assessing the frequency and severity of nonsuicidal self-injury

General Anxiety Disorder-7

GAD-7 total score for the seven items ranges from 0 to 21. 0-4: minimal anxiety. 5-9: mild anxiety. 10-14: moderate anxiety. 15-21: severe anxiety.

Patient Health Questionnaire-9

The Patient Health Questionnaire-9 (PHQ-9) is a widely used brief screening tool that can assist both in identifying individuals with major depression disorder, as well as assessing the severity of depressive symptoms.

Beck's Suicide Intent Scale

The total score of the BSSI ranges from 0 to 37, with higher scores indicating more severe suicidal ideation

Self-harm behaviour craving visual analog scale

Assessment of self-harm behaviour craving in NSSI adolescent

Internet Addiction Test

The IAT total score is the sum of the ratings given by the examinee for the 20 item responses. Each item is rated on a 5-point scale ranging from 0 to 5. The maximum score is 100 points. The higher the score is, the higher is the severity of your problem. Total scores that range from 0 to 30 points are considered to reflect a normal level of Internet usage; scores of 31 to 49 indicate the presence of a mild level of Internet addiction; 50 to 79 reflect the presence of a moderate level; and scores of 80 to 100 indicate a severe dependence upon the Internet.

The Pittsburgh Sleep Quality Index

Each component score of the PSQI ranges from 0 to 3, with 3 indicating the greatest dysfunction or disturbance. The seven component scores are then summed to obtain a global PSQI score, which ranges from 0 to 21. Higher scores indicate poorer sleep quality, with a score greater than 5 suggesting significant sleep difficulties

Insomnia Severity Index

Respondents rate each element of the questionnaire using Likert-type scales. Responses can range from 0 to 4, where higher scores indicate more acute symptoms of insomnia. Scores are tallied and can be compared both to scores obtained at a different phase of treatment and to the scores of other individuals. Though developers point out that their chosen cutoff scores have not been validated, they offer a few guidelines for interpreting scale results: a total score of 0-7indicates"no clinically significant insomnia, "8-14 means"subthreshold insomnia, "15-21 is"clinical insomnia(moderate severity), "and 22-28 means"clinical insomnia(severe). "

The Morningness-Eveningness Questionnaire (MEQ)-5

Assess morningness and eveningness. Questions are framed in a preferential manner, where the respondent is asked to indicate when, for example, he/she would prefer to wake up or start sleep, rather than when he/she actually does.