Variable-length Cognitive Processing Therapy for Combat-Related PTSD

The primary goal of this study is to improve the overall efficacy of cognitive processing
therapy-cognitive-only version (CPT-C) in a sample of 130 active-duty service members through
a variable length treatment. The study seeks to determine if some service members would
benefit from a longer or shorter dose of treatment (4-24 sessions), and to identify which
individuals are likely to require more, less, or the standard number of treatment sessions to
reach good end-state functioning. Predictors of length of therapy and treatment outcome will
be examined. Specifically, we will evaluate factors related to internalizing/externalizing
traits, cognitive flexibility, inability to inhibit dysfunctional cognitions, and readiness
to change as they are related to the number of treatment sessions required to treat patients
to the point of good end-state functioning. Additional outcomes including alcohol use,
psychosocial functioning, physical health, and sleep also will be evaluated.

Inclusion Criteria:

- Adult male and female combat veterans who deployed in support of combat operations
following 9/11

- Diagnosis of PTSD determined by a Clinician-Administered Posttraumatic Stress Scale
(CAPS-5)

- Speak and read English

Exclusion Criteria:

- Current suicide or homicide risk meriting crisis intervention.

- Active psychosis.

- Moderate to severe brain damage (as determined by the inability to comprehend the
baseline screening questionnaires).

- Local availability of fewer than 5 months

- Late-phase Med Board status, awaiting percentages

- Undergoing a chapter