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Internet-delivered acceptance-based behaviour therapy for generalized anxiety disorder: A randomized controlled trial
Mats Dahlin1, Gerhard Andersson2, Kristoffer Magnusson3
1Psykologpartners, Private Practice, Linköping, Sweden.
Behaviour Research and Therapy
|January 6, 2016
Summary
Therapist-guided internet-delivered acceptance-based behavior therapy significantly reduced generalized anxiety disorder (GAD) symptoms. These positive effects on anxiety and depression were maintained at six months, though quality of life did not improve.
Area of Science:
- Psychiatry
- Clinical Psychology
- Behavioral Science
Background:
- Generalized anxiety disorder (GAD) is a significant cause of disability.
- Cognitive Behaviour Therapy (CBT) is an established treatment for GAD.
- Internet-delivered interventions offer scalable treatment options.
Purpose of the Study:
- To evaluate the efficacy of therapist-guided internet-delivered acceptance-based behaviour therapy (ABT) for GAD.
- To assess the impact of this intervention on depressive symptoms and quality of life.
- To examine the maintenance of treatment effects at six-month follow-up.
Main Methods:
- 103 participants with GAD were randomized to immediate internet-delivered ABT or a waiting-list control.
- The intervention included online modules, an audio CD, a workbook, and therapist guidance.
- Hierarchical linear modeling was used to analyze symptom changes.
Main Results:
- Moderate to large effects were observed on GAD symptoms (Cohen's d = 0.70–0.98).
- Moderate effects were found for depressive symptoms (Cohen's d = 0.51–0.56).
- No significant effects were found on quality of life; effects were maintained at follow-up.
Conclusions:
- Internet-delivered, therapist-guided ABT is effective in reducing GAD symptoms.
- The treatment shows sustained benefits for anxiety and depressive symptoms.
- Further research may explore optimizing interventions for quality of life improvements.
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