Internet-delivered cognitive behaviour therapy for paediatric anxiety disorders in clinical settings : increasing access to evidence-based treatments

Background: Paediatric anxiety disorders are common, impairing and associated with a societal and economic burden. Even though there are efficacious treatments to treat these disorders, access to them are limited. Internet-delivered cognitive behaviour therapy (ICBT) has gained support for being an efficacious treatment for paediatric anxiety disorders and is suggested as one possible solution to increase access to evidence-based treatments. Aims and methods: The main aim of this thesis was to evaluate the BiP Anxiety programme, for children aged 8 to 12 years old with an anxiety disorder, in two clinical settings. First by con­ducting a randomised controlled trial within a specialised ICBT clinic part of the child and adolescent mental health services (CAMHS) in Stockholm. Secondly by conduct­ing a pilot feasibility trial at a CAMHS outpatient clinic in rural Sweden. Specific aims were to evaluate (1) the effects and cost-effectiveness ofICBT compared to an active placebo control, (2) the long term effect of ICBT within a stepped-care model where non-remitters of treatment were offered additional treatment, (3) predictors of treatment outcome, and ( 4) the feasibility and potential effectiveness ofICBT when disseminated in an outpatient clinic in rural Sweden. Results: ICBT was effective in reducing anxiety symptoms in a cost-effective manner when compared to a placebo condition controlling for non-specific therapeutic factors such as attention and weekly homework assignments. Treatment gains were maintained up to 12 months after the end of the treatment. Participants with a principal diagnosis of separation anxiety disorder, and those more engaged in behaviour change were more likely to be in remission at the three-months follow-up. Participants with more severe anxiety were less likely of being in remission. Additional face-to-face treatment for non-remitters ofICBT was efficacious for those receiving it. The majority of non-remitters however declined this offer