SOPHIE: Online-intervention for Prevention and Treatment of Social Anxiety in Adolescents

Current and past mental disorder assessed by the structured diagnostic interview for mental disorders of childhood and adolescence (Kinder-DIPS; Schneider et al., 2017)

At Baseline, the entire Kinder-DIPS will be assessed. At post and follow-up, only the sections for social anxiety and comorbid diagnoses met at baseline are assessed.

Time frame: Assessed at baseline, at post-intervention (2 months after baseline) and follow-up (5 months after intervention);

Change in global functioning assessed by the GF Social (Cornblatt et al., 2007)

Structured interview assessing the level of functioning in social areas of life (friends \& family) ranging from 1 to 10, higher scores indicate a better level of functioning

Time frame: Assessed at baseline, at post-intervention (2 months after baseline) and follow-up (5 months after intervention)

Change in global functioning assessed by the GF Role Scale (Cornblatt et al., 2007)

Structured interview assessing the level of functioning in school / work ranging from 1 to 10, higher scores indicate a better level of functioning

Time frame: Assessed at baseline, at post-intervention (2 months after baseline) and follow-up (5 months after intervention)

Utilisation of help assessed by the Client Sociodemographic and Service Receipt Inventory (CSSRI-EU; Chisholm et al., 2000; Roick et al., 2001)

Structured interview assessing the additional use of psychological, medical and other formal and informal services and sources of help (e.g. at school, friends)

Time frame: Assessed at post-intervention (2 months after baseline) and follow-up (5 months after baseline)

Change of fear of negative evaluation and avoidance assessed by the Social Anxiety Scale for Adolescents (SAS-A; La Greca & Lopez,1998)

Total score ranging from 18 - 90 (representing the sum of each of the 18 individual items). Lower scores represent less fear of negative evaluation and avoidance and a more favourable outcome.

Time frame: Assessed at baseline, at mid-treatment (1 month after baseline), at post-intervention (2 months after baseline), and at follow-up (5 months after baseline)

Change of generalized anxiety symptoms assessed by the Generalized Anxiety Disorder 7 (GAD-7; Löwe et al., 2008) questionnaire

Total score ranging from 7 - 35 (representing the sum of each of the 7 individual items). Lower scores represent less anxiety and a more favourable outcome.

Time frame: Assessed at baseline, at mid-treatment (1 month after baseline), at post-intervention (2 months after baseline), and at follow-up (5 months after baseline)

Change in depressive symptoms assessed by the Patient Health Questionnaire-9 for Adolescents (PHQ-A; Johnson et al., 2002)

Total score ranging from 0 - 27 (representing the sum of each of the 9 individual items). Lower scores represent less depressive symptoms and a more favourable outcome.

Time frame: Assessed at baseline, at mid-treatment (1 month after baseline), at post-intervention (2 months after baseline), and at follow-up (5 months after baseline)

Change in health-related quality of life assessed by the KIDSCREEN-10 (Ravens-Sieberer et al., 2010)

Total score ranging from 11 - 55 (representing the sum of each of the 11 individual items). Higher scores represent a higher quality of life and a more favourable outcome.

Time frame: Assessed at baseline, at mid-treatment (1 month after baseline), at post-intervention (2 months after baseline), and at follow-up (5 months after baseline)

Change in self-esteem assessed by the Rosenberg Self-Esteem Scale (RSES; Rosenberg, 1965)

Total score ranging from 0 - 30 (representing the sum of each of the 10 individual items). Higher scores represent a higher self-esteem and a more favourable outcome.

Time frame: Assessed at baseline, at mid-treatment (1 month after baseline), at post-intervention (2 months after baseline), and at follow-up (5 months after baseline)

Change in social anxiety assessed by the Social Phobia Inventory (SPIN; Connor et al., German Version: Sosic et al., 2008)

Measure of social anxiety, total score ranging from 0 - 68 (representing the sum of each of the 17 individual items). Lower scores represent less social anxiety and a more favourable outcome.

Time frame: Assessed at baseline, at mid-treatment (1 month after baseline), at post-intervention (2 months after baseline), and at follow-up (5 months after baseline)