- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03433625
6-Session Treatment for Generalized Anxiety Disorder
November 2, 2020 updated by: Michel Dugas, Ph.D., Universite du Quebec en Outaouais
Behavioural Experiments for Intolerance of Uncertainty: A 6-session Treatment for Generalized Anxiety Disorder
Generalized Anxiety Disorder (GAD) is a chronic condition that is characterized by excessive and uncontrollable worry and anxiety.
In Canada, 3 to 4% of the population suffer from GAD at any point in time.
These individuals have a lowered quality of life and are at risk for many medical conditions such as coronary heart disease and cancer.
Research suggests that both pharmacological and psychological approaches are effective for treating GAD in the short-term; however, psychological treatments appear to offer the greatest long-term benefits.
There exist a number of effective psychological treatments for GAD, most of which fall into the category of cognitive-behavioural therapy or CBT.
In the 1990s, a group of Canadian investigators developed a CBT protocol for GAD that included four components.
Data from five clinical trials suggest that one of the four components is particularly important for treatment success: experiencing uncertainty rather than avoiding it in everyday life.
Stated differently, learning to tolerate and deal with uncertainty appears to be the key to decreasing worry and anxiety.
Given this finding, the investigators have developed a new treatment that exclusively targets intolerance of uncertainty: Behavioural Experiments for Intolerance of Uncertainty or BE-IU.
The goal of the current proposal is to test the efficacy of BE-IU (6 weekly treatment sessions) by comparing it to a Waiting List (WL) control condition (6 weeks).
A total of 50 participants with a primary diagnosis of GAD will be randomly assigned to either BE-IU or WL and will be assessed at 4 time points ranging from pre-treatment to 12-month follow-up.
The conditions will be compared in terms of treatment efficacy and mechanisms.
The investigators will also examine the predictors of change during the 12-months following treatment.
The proposed study will produce data on the efficacy and mechanisms of a treatment for GAD that is less costly, less complex and easier to disseminate than treatments that are currently available.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Study Type
Interventional
Enrollment (Actual)
36
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
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Quebec
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Gatineau, Quebec, Canada, J8X 3X7
- Universite du Quebec en Outaouais
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
16 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- at least 18 years of age;
- principal diagnosis of GAD;
- no change in medication type or dose in 4 to 12 weeks before study entry (4 weeks for benzodiazepines, 12 weeks for antidepressants and hypnotics);
- willingness to keep medication status stable while participating in the study;
- no use of herbal products known to have CNS effects in the 2 weeks before study entry;
- no evidence of suicidal intent (based on clinical judgement);
- no evidence of current substance abuse, current or past schizophrenia, bipolar disorder or organic mental disorder;
- no current participation in other trials;
- no concurrent psychotherapy during treatment phase of trial;
- no evidence of anxiety symptoms due to a general medical condition based on clinical judgement (e.g., clinical hyperthyroidism, hypoglycaemia, anaemia).
Exclusion Criteria:
-
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Behavioural experiments (CBT)
Behavioural experiments involve selecting a specific thought to be tested (e.g., "uncertainty makes me unable to act") and designing a detailed experiment to test out the thought.
|
CBT
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No Intervention: Waiting list
6 week wait (with assessments) before being transferred to the experimental condition.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Clinician's Severity Rating (CSR) of Anxiety Disorders Interview Schedule (ADIS)
Time Frame: 8 weeks
|
Structured diagnostic interview
|
8 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Penn State Worry Questionnaire
Time Frame: 8 weeks
|
16-item self-report questionnaire measuring trait worry.
Only the total score is reported (range: 16 to 80).
Higher values represent a worse outcome.
|
8 weeks
|
Worry and Anxiety Questionnaire
Time Frame: 8 weeks
|
11-item self-report questionnaire measuring diagnostic criteria for generalized anxiety disorder.
Only the total score is reported (range: 7 to 35).
Higher values represent a worse outcome.
|
8 weeks
|
Beck Anxiety Inventory
Time Frame: 8 weeks
|
21-item self-report questionnaire measuring anxiety over the past week.
Only the total score is reported (range: 0 to 63).
Higher values represent a worse outcome.
|
8 weeks
|
Beck Depression Inventory-II
Time Frame: 8 weeks
|
21-item self-report questionnaire measuring depressive symptoms over the past 2 weeks.
Only the total score is reported (range: 0 to 63).
Higher values represent a worse outcome.
|
8 weeks
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Intolerance of Uncertainty Scale
Time Frame: 8 weeks
|
27-item self-report questionnaire measuring negative beliefs about uncertainty.
Only the total score is reported (range: 27 to 135).
Higher values represent a worse outcome.
|
8 weeks
|
Safety Behaviours Questionnaire
Time Frame: 8 weeks
|
18-item self-report questionnaire measuring the use of avoidance and safety behaviors.
Only the total score is reported (range: 18 to 90).
Higher values represent a worse outcome.
|
8 weeks
|
Heart rate variability
Time Frame: 8 weeks
|
Heart rate monitoring with chest strap and Polar watch
|
8 weeks
|
Acceptance and Action Questionnaire, second edition
Time Frame: 8 weeks
|
10-item self-report questionnaire measuring acceptance of internal experiences and commitment to valued action.
Only the total score is reported (range 10 to 70).
Higher values represent a better outcome.
|
8 weeks
|
Pain Catastrophizing Scale
Time Frame: 8 weeks
|
13-item self-report questionnaire measuring negative beliefs about pain.
Only the total score is reported (range: 0 to 52).
Higher values represent a worse outcome.
|
8 weeks
|
Agression Questionnaire
Time Frame: 8 weeks
|
12-item self-report questionnaire measuring the tendency to become angry.
Only the total score is reported (range: 12 to 60).
Higher values represent a worse outcome.
|
8 weeks
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Collaborators
Investigators
- Principal Investigator: Michel J Dugas, Ph.D., Universite du Quebec en Outaouais
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
February 8, 2018
Primary Completion (Actual)
July 1, 2020
Study Completion (Actual)
July 1, 2020
Study Registration Dates
First Submitted
February 8, 2018
First Submitted That Met QC Criteria
February 13, 2018
First Posted (Actual)
February 14, 2018
Study Record Updates
Last Update Posted (Actual)
November 3, 2020
Last Update Submitted That Met QC Criteria
November 2, 2020
Last Verified
November 1, 2020
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 2252
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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Clinical Trials on Behavioural experiments for intolerance of uncertainty (BE-IU)
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University of ManitobaSuspendedGeneralized Anxiety Disorder | Anxiety | Intolerance of UncertaintyCanada
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Universite du Quebec en OutaouaisRecruitingGeneralized Anxiety Disorder | Adolescent - Emotional ProblemCanada
-
Concordia University, MontrealBrown University; Université de Sherbrooke; Ryerson University; Université du Québec... and other collaboratorsCompletedGeneralized Anxiety DisorderCanada
-
CSL BehringCompletedHereditary Angioedema Types I and IIBulgaria, Hungary, Poland, Romania