Examining patterns of dose response for clients who do and do not complete cognitive processing therapy

Area of Science:

• Psychology
• Clinical Psychology
• Trauma Studies

Background:

• Trauma-focused therapies like Cognitive Processing Therapy (CPT) effectively reduce PTSD symptoms.
• Client non-completion of treatment remains a significant challenge in CPT implementation.
• Understanding non-completion patterns is crucial for improving therapeutic outcomes.

Purpose of the Study:

• To examine temporal patterns of treatment non-completion in CPT.
• To investigate the relationship between non-completion, PTSD symptoms, and mental health functioning.
• To test dose-effect and good-enough level models of CPT symptom change.

Main Methods:

• A randomized controlled trial of CPT implementation was analyzed.
• Temporal patterns of treatment non-completion were assessed.
• Relationships between session attendance, PTSD symptom change, and mental health functioning were examined.

Main Results:

• 42% of clients did not complete the CPT protocol, with most discontinuing between sessions two and five.
• Neither the dose-effect nor the good-enough level model accurately described symptom change.
• Clients who improved more in PTSD symptoms and mental health functioning attended more sessions.
• Optimal outcomes were associated with completing all 12 sessions.

Conclusions:

• Client retention in CPT is vital for maximizing treatment effectiveness.
• Identifying at-risk clients for non-completion and implementing retention strategies are imperative.
• Further research should focus on factors influencing CPT completion rates and developing targeted interventions.