Authors
Alexander C Kline, Laura D Crocker, Nicholas P Otis, Juan Diego Vera, Hayley C Myers, Lisa H Glassman, W Michael Hunt, Kristen H Walter
Published in
Psychotherapy research : journal of the Society for Psychotherapy Research. Pages 1-14. Sep 09, 2026. Epub Sep 09, 2026.
Abstract
Major depressive disorder (MDD) commonly co-occurs with posttraumatic stress disorder (PTSD) and increases risk for reduced response to evidence-based PTSD treatment, yet little is known regarding the dose-outcome link for this comorbidity.
The relationship between attendance and reliable change was examined among 88 service members with comorbid PTSD/MDD receiving cognitive processing therapy (CPT) or CPT with behavioral activation (BA + CPT) in a clinical trial. Survival analyses calculated reliable change likelihood during treatment for PTSD, MDD, and both, and explored between-treatment differences.
Among participants reporting reliable change, median attendance equaled the full treatment protocol. Reliable change likelihood was higher when completing treatment versus adequate dose. A log-rank test comparing Kaplan-Meier curves between treatments was statistically significant for reliable change in both disorders (χ2(1) = 4.46, p = .03), but not PTSD (χ2(1) = 3.06, p = .08) or MDD (χ2(1) = 1.86, p = .17) alone. Cox proportional hazards regression indicated reliable change for both disorders was less likely in BA + CPT (hazard rate = 0.52, 95% confidence interval: 0.28, 0.97, p = .04).
Results highlight differences in symptom change timing between a standard and integrated treatment and suggest strong adherence (i.e., completing protocol) is critical for this comorbidity.Trial registration: ClinicalTrials.gov identifier: NCT02874131..
PMID:
42714093
Bibliographic data and abstract were imported from PubMed on 09 Sep 2026.
Read full publication at:
Please sign in
to see all details.
Advertisement
Stats
- Recommendations n/a n/a positive of 0 vote(s)
- Views 10
- Comments 0