Capnometry-Guided Respiratory Intervention in Veteran PTSD: Impact on Symptom Clusters

Area of Science:

• Psychiatry
• Psychotherapy research
• Biofeedback applications

Background:

• Post-traumatic stress disorder (PTSD) presents treatment challenges, with limited success in exposure-based therapies.
• Veterans often experience suboptimal recovery and difficulties with existing PTSD treatments.

Purpose of the Study:

• To evaluate symptom reduction in veterans with PTSD using Capnometry-Guided Respiratory Intervention (CGRI).
• To investigate the efficacy of CGRI on PTSD symptom clusters, particularly hyperarousal symptoms.

Main Methods:

• Retrospective analysis of real-world outcomes for 164 veterans treated with CGRI.
• Pre- and post-treatment PTSD Checklist for DSM-5 (PCL-5) scores were analyzed.
• Participants were categorized into Recovered, Improved, or Suboptimal subgroups based on treatment response.

Main Results:

• 53% of participants showed treatment response, with a significant mean PCL-5 total score reduction of 12 points (Glass's Δ = 0.99).
• All symptom clusters, including hyperarousal (effect size = 0.98), demonstrated medium to large effect sizes.
• Recovered and Improved subgroups showed significant reductions across various PCL-5 items.

Conclusions:

• CGRI effectively reduced PTSD symptoms, including total scores and cluster scores, in veterans.
• Hyperarousal symptoms, often resistant to other therapies, were responsive to CGRI.
• CGRI demonstrates potential for broad symptom improvement in PTSD patients immediately post-treatment.