Somatic Symptom Disorder Clinical Trial
Official title:
Self-help Based Cognitive Behavior Therapy for Health Anxiety Delivered Via the Internet or in Book Form - the Effect of Administration Strategy and Therapist Contact: a Randomized Controlled Trial
Background
Severe health anxiety, Somatic symptom disorder or Illness anxiety disorder according to the
Diagnostic and Statistical Manual of Mental Disorders 5 (DSM-5), is associated with
considerable personal distress, functional disability and societal costs. Several studies
have demonstrated the efficacy of Cognitive Behavior Therapy (CBT) for severe health
anxiety, both on anxiety itself and on secondary symptom measures (for example of
depression). One published randomized controlled trial (RCT) has examined the feasibility of
delivering CBT for severe health anxiety via the Internet as a form of guided self help.
Participants had contact with a therapist via an e-mail-like system throughout the
treatment. This approach yielded results superior to a waiting-list condition, thus
potentially greatly increasing the availability of psychological treatment. However, more
studies on the effects of Internet-delivered CBT are warranted (NCT01673035 being one).
Additionally, little is known about the active ingredients and mechanisms of change involved
in Internet-delivered CBT. For example, the significance of therapist support in relation to
treatment outcomes remains to be determined. CBT-based self-help literature, so called
bibliotherapy, has shown great promise in the treatment of several anxiety disorders,
including panic disorder and social anxiety disorder. Two small pilot studies have indicated
that bibliotherapy with no or minimal therapist contact could be suitable for treating
health anxiety.
Aim of the study
The aim of the present RCT is to compare therapist-guided Internet-delivered CBT (n=33),
Internet-delivered CBT without therapist guidance (n=33), CBT-based bibliotherapy without
therapist guidance (n=33) and a waiting-list control condition (n=33) for adult participants
with severe health anxiety.
Participants in all treatment programs are expected to be significantly improved on measures
of health anxiety, compared to participants allocated to the waiting-list condition.
n/a
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment
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