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Digital Cognitive Behavioral Treatment for Generalized Anxiety Disorder: A Randomized Clinical Trial.

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Smartphone-delivered digital cognitive behavioral therapy (DCBT) significantly reduced anxiety symptoms in adults with generalized anxiety disorder (GAD). This accessible DCBT program offers a promising public health benefit for GAD treatment.

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Area of Science:

  • Mental Health
  • Digital Therapeutics
  • Clinical Psychology

Background:

  • Generalized anxiety disorder (GAD) is a chronic mental health condition with limited access to first-line treatments like cognitive behavioral therapy (CBT).
  • Digital CBT (DCBT) programs offer a potential solution to overcome treatment barriers and expand the reach of effective therapies.

Purpose of the Study:

  • To assess the effectiveness of a smartphone-delivered DCBT program compared to an active psychoeducation control for treating GAD.
  • To evaluate symptom severity and remission rates in participants receiving DCBT.

Main Methods:

  • A single-blind, decentralized randomized clinical trial involving 351 adults diagnosed with GAD.
  • Participants were randomized 1:1 to receive either a self-directed, tailored DCBT via smartphone or an online psychoeducation intervention.
  • Outcomes were measured at 10 and 24 weeks using the GAD-7 scale for anxiety severity and the CGI-I scale for remission status.

Main Results:

  • DCBT significantly reduced GAD-7 anxiety scores at both 10 weeks (Cohen d = 1.09) and 24 weeks (Cohen d = 0.96).
  • Remission rates were substantially higher in the DCBT group: 71.0% at 10 weeks and 77.7% at 24 weeks, compared to 34.6% and 52.0% in the control group, respectively.
  • These benefits were statistically significant (P < .001) and sustained over the study period.

Conclusions:

  • Smartphone-delivered DCBT is an effective treatment for GAD, providing significant and lasting improvements in anxiety symptoms.
  • The DCBT program demonstrates considerable potential for public health, addressing access limitations to evidence-based CBT.
  • This digital intervention represents a scalable and accessible option for individuals suffering from generalized anxiety disorder.