Internet-delivered Cognitive Behavioural Therapy for Adolescents With Anxiety

有源比较器：ICBT standard

Internet-based cognitive behavioural therapy with therapeutic guidance through mail

行为的：Guided-ICBT for adolescents with anxiety

Internet-based cognitive behavioural therapy with therapeutic guidance through mail, 8 weeks.

实验性的：ICBT chat

Internet-based cognitive behavioural therapy with therapeutic guidance through chat

行为的：Guided-ICBT with chat

Internet-based cognitive behavioural therapy with therapeutic guidance through chat, 8 weeks.

实验性的：ICBT learning support

Internet-based cognitive behavioural therapy with learning support and therapeutic guidance through mail

行为的：Guided-ICBT with learning support

Internet-based cognitive behavioural therapy with learning support and therapeutic guidance through mail, 8 weeks.

实验性的：ICBT with learning support and chat

Internet-based cognitive behavioural therapy with learning support and therapeutic guidance through chat

行为的：Guided-ICBT with learning support and chat

Internet-based cognitive behavioural therapy with learning support and therapeutic guidance through chat, 8 weeks.

Beck Anxiety Inventory (BAI)

Measures clinical anxiety. Change from baseline in symptoms two weeks post treatment and at 12 months post treatment.

Beck Depression Inventory - II (BDI-II)

Measures clinical depression. Change from baseline in symptoms two weeks post treatment and at 12 months post treatment.

Penn State Worry Questionnaire for Children (PSWQ - C)

Measures the tendency of youth to engage in excessive, generalized and uncontrollable worry. Respondents rates each item on a 4-point Likert scale consisting of never (0), sometimes (1), often (2) and always (3). The scores from each item are summed together to yield a total score that ranges from 0-42, with higher scores reflecting higher levels of worry. Change from baseline in symptoms two weeks post treatment and at 12 months post treatment.

Generalised Anxiety Disorder (GAD-7)

Measures severity of generalised anxiety.

Mini-Social Phobia Inventory (MINI-SPIN)

Measures clinical social phobia. Change from baseline in symptoms two weeks post treatment and at 12 months post treatment.

Agoraphobic Cognitions Questionnaire (ACQ)

Measures fearful cognitions associated with panic attacks and agoraphobia. The ACQ consists of 14 items which will be scored as a total scale in this study. worry. Respondents rates each item on a 5-point Likert scale consisting of never (1), Thought never occurs (2), Thought rarely occurs (3) Thought occurs during half of the times when I am nervous (4) Thought usually occurs (5) Thought always occurs when I am nervous. ACQ can be divided into two subscales: Loss of Control and Physical Concerns. Each of the subscales consists of 7 items.The total scores (or the subscales) are calculated by averaging the responses to the individual items composing that score. Higher scores indicates higher levels of fearful cognitions. Change from baseline in symptoms two weeks post treatment and at 12 months post treatment.

Satisfaction With Life Scale (SWLS)

Measures global cognitive judgements of one's life satisfacation as a whole, on a 5-item scale. Respondants rates how much they agree or disagree on a 7-pont scale ranging from (7) strongly agree to (1) strongly disagree, where higher scores indicates higher levels of life satisfaction. Change from baseline in symptoms two weeks post treatment and at 12 months post treatment.

Rosenberg Self-Esteem Scale (RSES)

Evaluates individual self-esteem. The scale is a ten item Likert scale with items answered on a four point scale, from (0) strongly agree to strongly disagree (3), where higher scores indicates higher self-esteem. Change from baseline in symptoms two weeks post treatment and at 12 months post treatment.

Alcohol Use Disorders Identification Test (AUDIT)

Measures alcohol consumption, drinking behaviors, and alcohol-related problems. Change from baseline in symptoms two weeks post treatment and at 12 months post treatment.

Knowledge of CBT strategies (developed by the research group)

A brief 16-item questionnaire that measures explicit, declarative knowledge about core CBT-principles and therapeutic points. Higher scores indicates more knowledge. Change from baseline in symptoms two weeks post treatment and at 12 months post treatment.