Effectiveness of an Internet-based prevention intervention for depression and anxiety

INTERVENTION: Acces to ICare Prevent, a transdiagnostic Internet‐based intervention. The intervention is based on CBT principles. One arm of the RCT is self‐guided, the other arm receives feedback on exercises by a trained eCoach. All three groups in the RCT have access to usual care. CONDITION: Depression, Anxiety ; ; PRIMARY OUTCOME: Disorder specific symptom severity at post‐intervention (Quick Inventory for Depression Scale + Hamilton Anxiety Rating Scale) SECONDARY OUTCOME: Time to mental health disorder onset within 6 and 12 months follow‐up as well as moderators and mediators of intervention outcome and adherence. In addition, societal costs and healthcare utilization are investigated to estimate the intervention’s cost‐effectiveness. INCLUSION CRITERIA: Age > 16; subclinical symptoms of depression (Center for Epidemiologic Studies Depression Scale = 16) and/or anxiety (7‐item Generalized Anxiety Disorder scale = 5); not meeting criteria for a full syndrome presentation of any common mental health disorder within the past six months, in the absence of cardinal symptoms during the past three weeks (assessed by the MINI International Neuropsychiatric Interview)