Hypochondriasis Clinical Trial
Official title:
Cognitive Behavior Therapy vs. Behavioral Stress Management for Severe Health Anxiety: a Randomized Controlled Trial of Two Internet-based Treatments
Background
Severe health anxiety, hypochondriasis according to DSM-IV, is common and associated with
functional disability. Cognitive behavior therapy (CBT) and behavioral stress management
(BSM) have been showed to be effective in the treatment of severe health anxiety. The
mechanisms of the treatments are however poorly understood. In addition, effective
psychological treatments are accessible to only a few. One prior RCT has shown that
internet-based CBT could be effective in comparison to waiting list controls. More studies
on internet-based CBT is essential to establish evidence. In addition, few studies with
sufficient power have investigated the effect of CBT in comparison to other active
treatments.
Aim of the study The aim of the present RCT is to compare internet-based CBT (n=110) to
behavioral stress management (n=110) for adult participants with severe health anxiety. BSM
is considered a comparison treatment for two reasons: it has been shown to be effective and
it lacks exposure and response prevention, which is suggested to be an important mechanism
in CBT.
Participants in both treatments are expected to be significantly improved on measures of
health anxiety. Participants receiving CBT are expected to be significantly more improved
compared to participants receiving BSM.
Background
Severe health anxiety, hypochondriasis according to DSM-IV, is common and associated with
functional disability. Cognitive behavior therapy (CBT) and behavioral stress management
(BSM) have been showed to be effective in the treatment of severe health anxiety. The
mechanisms of the treatments are however poorly understood. In addition, effective
psychological treatments are accessible to only a few. One prior RCT has shown that
internet-based CBT could be effective in comparison to waiting list controls. More studies
on internet-based CBT is essential to establish evidence. In addition, few studies with
sufficient power have investigated the effect of CBT in comparison to other active
treatments.
Aim of the study The aim of the present RCT is to compare internet-based CBT (n=110) to
behavioral stress management (n=110) for adult participants with severe health anxiety. BSM
is considered a comparison treatment for two reasons: it has been shown to be effective and
it lacks exposure and response prevention, which is suggested to be an important mechanism
in CBT.
The investigators expect participants in both treatments to be significantly improved on
measures of health anxiety. Participants receiving CBT are expected to be significantly more
improved compared to participants receiving BSM.
Design:
Randomized controlled trial. Participants are randomized in a 1:1 ratio.
Assessments:
The primary outcome measure is the Health Anxiety Inventory (HAI). Assessments with HAI are
conducted at baseline, post-treatment, 3- and 12 month follow-up.
;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment
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