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CompletedNCT02331537Updated Sep 1, 2015

Internet-based Exposure Therapy for Excessive Worry

An interventional study of Internet-based cognitive-behavior therapy in Excessive Worry and Rumination, sponsored by Karolinska Institutet. Completed at 1 site in Sweden. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2015-09-01.

Sponsored by Karolinska Institutet · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
140
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to examine if an internet-based exposure therapy is effective in reducing excessive worry amongst patients who suffer from this problem.

Read the detailed description

Trial Objectives: Primary objective is to investigate whether an Internet-based exposure therapy can effectively reduce the degree of excessive worry. The secondary objective is to a) investigate whether imagery based exposure is more effective than verbal exposure. b) investigate the cost-effectiveness of this treatment and c) to study if any variables could moderate/mediate the treatment outcome, such as metacognitions, degree of rumination or degree of depression.

Trial Design: Randomized controlled trial with waitlist control, who also will recieve treatment after the first group has finished.

Duration: Ten weeks

Primary Endpoint: Change in worry symptoms from baseline to Week 10. Long term follow-up is also investigated (baseline to 4-months after treatment completion and baseline to 12-months after treatment completion).

Efficacy Parameters: Penn State Worry Questionnaire (PSWQ)

Safety Parameters: Adverse Events is assessed weekly via the internet.

Description of Trial Subjects: Patients > 18 years old with a PSWQ score more than 56 points

Number of Subjects: 140

02

Conditions studied

  • Excessive Worry
  • Rumination

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03

In context

Rumination Syndrome

72 studies on the registry are indexed under Rumination Syndrome; 22 are open to participants now.

This study's planned enrollment of 140 is above the median of 62 across 63 interventional studies indexed under Rumination Syndrome.

Browse Rumination Syndrome studies →

Lead sponsor

Karolinska Institutet is the lead sponsor of 1,113 studies on the registry; 267 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Outpatients
  • ≥ 18 years
  • Situated in Sweden
  • Informed consent
  • Penn State Worry Questionnaire score more than 56 points

Exclusion criteria

Exclusion Criteria:

  • Substance dependence during the last six months
  • Post traumatic stress disorder, bipolar disorder or psychosis
  • Symptoms better explained by axis 2 diagnosis (e.g. autism or borderline personality disorder)
  • MADRS-S score above 25 points
  • Psychotropic medication changes within two months prior to treatment that could affect target symptoms.
  • Received exposure based Cognitive behavior therapy (CBT) for pathological worry the last 2 years
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
140 participants (estimated)

Study arms

  • Experimental
    Internet-based cognitive-behavior therapy

    The experimental group will go through active internet-based treatment. The treatment is 10 weeks long and is based on the principles of exposure i.e. the participant is instructed to stay with the frightening thought until it is no longer associated with anxiety.

    Behavioral: Internet-based cognitive-behavior therapy

  • No intervention
    Waitlist

    Waitlist control that will get the internet-based treatment when the first group has finished (i.e. Week 10). There are no active treatment for these participants at all.

Interventions

  • BehavioralInternet-based cognitive-behavior therapy

    Internet-based cognitive-behavior therapy on a safe internet platform. Treatment is divided into seven modules, each containing homework assignments . The participants will be assigned a therapist that they can contact through a message system in the platform and expect answer within 24 hours.

06

What researchers measure

Primary outcomes

  1. Penn State Worry Questionnaire (PSWQ)

    Change in worry from baseline to Week 10, and at 4- and 12 months after treatment has ended.

    Time frame: Week 0, Week 10, Long term follow-up at 4-, and 12-months after treatment has ended

Secondary outcomes

  1. Meta Cognitions Questionnaire (MCQ-30)

    Change in metacognitions from baseline to Week 10 and at 4- and 12 months after treatment has ended.

    Time frame: Week 0, Week 10, long term follow-up at 4- and 12- months after treatment has ended

  2. Montgomery Åsberg Depression Rating Scale - Self-report (MADRS-S)

    Change in depression from baseline to Week 10 and at 4- and 12 months after treatment has ended.

    Time frame: Week 0, Week 10, long term follow-up at 4- and 12- months after treatment has ended

  3. Euroqol (EQ-5D)

    Change in general health from baseline to Week 10 and at 4- and 12 months after treatment has ended.

    Time frame: Week 0, Week 10, long term follow-up at 4- and 12- months after treatment has ended

  4. Hospital anxiety and depression scale (HADS)

    Change in anxiety and depression from baseline to Week 10 and at 4- and 12 months after treatment has ended.

    Time frame: Week 0, Week 10, long term follow-up at 4- and 12- months after treatment has ended

  5. Spontaneous Use of Imagery Scale (SUIS)

    Change in Spontaneous Use of Imagery from baseline to Week 10 and at 4- and 12 months after treatment has ended.

    Time frame: Week 0, Week 10, long term follow-up at 4- and 12- months after treatment has ended

  6. Cognitive Avoidance Questionnaire (CAQ)

    Change in cognitive avoidance from baseline to Week 10 and at 4- and 12 months after treatment has ended.

    Time frame: Week 0, Week 10, long term follow-up at 4- and 12- months after treatment has ended

  7. Trimbos and Institute of Medical Technology Assessment Cost Questionnaire for Psychiatry (TIC-P)

    Change in economic costs from baseline to Week 10 and at 4- and 12 months after treatment has ended.

    Time frame: Week 0, Week 10, long term follow-up at 4- and 12- months after treatment has ended

  8. Intolerance of Uncertainty Scale (IUS)

    Change in tolerance of uncertainty from baseline to Week 10 and at 4- and 12 months after treatment has ended.

    Time frame: Week 0, Week 10, long term follow-up at 4- and 12- months after treatment has ended

07

Study locations

1 site
  • Karolinska Institutet
    Stockholm, 17177, Sweden
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 1, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT02331537
Lead sponsor
Karolinska Institutet
Responsible party
Erik Andersson (PhD, psychologist, Karolinska Institutet) — Principal investigator
First posted
Jan 6, 2015
Start date
Jan 2015
Primary completion
Jun 2015
Completion
Jun 2015
Last update
Sep 1, 2015

Study contacts

Erik M Andersson, PhD
principal investigator · Karolinska Institutet

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Aug 2015. You cannot join it, but the record below documents what was studied.

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