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A Comparison Between Internet Therapy and Group Therapy for Social Phobia - A Trial Using Cognitive Behavioural Therapy (IS1)

This study has been completed.
Information provided by:
Karolinska Institutet Identifier:
First received: November 28, 2007
Last updated: October 25, 2010
Last verified: August 2009

Social phobia is one of the most prevalent anxiety disorders in the western world. Cognitive behavioural therapy (CBT) is the psychological treatment that has the largest empirical support. However, the availability to CBT is very limited in Sweden due to lack of therapists with proper training. Therefore it is important to evaluate alternative forms of treatment that are more time efficient. One of these methods is Internet based self-help therapy, which has proven to be an effective treatment for social phobia.

To the investigator´s knowledge, no study has yet directly compared live-CBT to Internet therapy. The aim of the present study is to compare the effect of live CBT vs CBT delivered via the Internet. The study is considered to be an equivalence trial. 128 patients will be randomly assigned to one of the two treatment conditions. The primary outcome measure is Liebowitz Social Anxiety Scale (LSAS).

Condition Intervention Phase
Social Phobia Behavioral: CBT via the Internet Behavioral: CBT group therapy Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Comparison Between Internet-based Self-help Therapy and Group Therapy for Social Phobia - A Clinical Equivalence Trial Using Cognitive Behavioural Therapy (CBT)

Resource links provided by NLM:

Further study details as provided by Karolinska Institutet:

Primary Outcome Measures:
  • Liebowitz Social Anxiety Scale (LSAS)

Secondary Outcome Measures:

Estimated Enrollment: 128
Study Start Date: November 2007
Study Completion Date: August 2010
Primary Completion Date: August 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
CBT via the Internet
Behavioral: CBT via the Internet
15 weeks, patients learn about CBT primarily thru a self-help book published on teh Internet, Minimal therapy contact via e-mail(10 minutes/week),
Experimental: 2
15 weeks, CBT group therapy, 1 session/week (2.5 hours).
Behavioral: CBT group therapy
15 weeks, 1 session/week, (2,5 hours.)


Ages Eligible for Study:   16 Years and older   (Child, Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Must have a primary diagnosis of social phobia

Exclusion Criteria:

  • Substance abuse during the last 6 months
  • Other dominating diagnosis (not phobic personality disorder)
  • A history of bipolar disorder or psychosis
  • Major depression according to DSM-IV and >20 on madrs-s
  • Risk of suicide
  • Start of medication or change of dosis during the last 2 months
  • Other parallel psychological treatment
  • Previous CBT (last 3 years) for social phobia
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Please refer to this study by its identifier: NCT00564967

Psykiatri Sydväst, Stockholm County Council
Stockholm, Sweden, 141 86
Sponsors and Collaborators
Karolinska Institutet
Principal Investigator: nils lindefors Karolinska Institutet
  More Information

Additional Information:
Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Nils Lindefors, MD, PHD, professor, Stockholm County Council and Karolinska Institute Identifier: NCT00564967     History of Changes
Other Study ID Numbers: IS1
Dnr 2005/178-31
Study First Received: November 28, 2007
Last Updated: October 25, 2010

Additional relevant MeSH terms:
Phobic Disorders
Anxiety Disorders
Mental Disorders processed this record on July 21, 2017