NCT06990191 · United States Department of Defense
A Hybrid 1 Effectiveness-Implementation Trial of Partner-Assisted Prolonged Exposure for PTSD
(COOPERATE)
What this study is about
PTSD occurs in up to 17% of post-9/11 US Service Members and is associated with long-term functional impairment, family problems, unemployment, and suicidality. Trauma-focused therapies (TFTs), such as Prolonged Exposure (PE), result in significant relief for many. Yet, TFTs are not equally effective for everyone.
View original scientific description
PTSD occurs in up to 17% of post-9/11 US Service Members and is associated with long-term functional impairment, family problems, unemployment, and suicidality. Trauma-focused therapies (TFTs), such as Prolonged Exposure (PE), result in significant relief for many. Yet, TFTs are not equally effective for everyone. An important minority (\~40%) will retain their PTSD diagnoses after treatment, and many discontinue treatment prematurely, especially post-9/11 Service Members. TFTs are also more effective in addressing symptoms than psychosocial functioning. More work is needed to improve the consistency and potency of TFTs. Partnering with significant others may provide a powerful method for helping individuals get more out of their PTSD treatment. Observational research shows that relationship factors can help patients initiate, stay in, and experience greater benefit from PTSD treatment. Veterans that were surveyed experienced greater treatment gains when they shared more about their treatment with loved ones and when loved ones accommodated less for PTSD symptoms. Despite the promise of partner-involved interventions, there is no couples approach to PTSD treatment that has demonstrated superior outcomes to individual-only treatment models (i.e., TFTs). To address this gap, the investigators have completed a series of partner-assisted PTSD treatment studies, leading up the current proposal (Partnered PE, PPE). The investigators found that treatment completion rates were better than routine clinical care, and the treatment led to large improvements in participants' functioning, PTSD symptoms, and romantic functioning. For this proposed study, the primary objective is to conduct a randomized controlled trial (Research Level 3; larger-scale clinical trial) to test the superiority of PPE to standard PE among post 9/11 Veterans. The investigator's primary hypothesis is that PPE will lead to greater improvements in psychosocial functioning than standard PE. Secondary and tertiary aims examine posttreatment clinical outcomes (PTSD, depression) and intimate partner outcomes (relationship functioning, distress, caregiver burden, and psychosocial functioning), as well as examine strategies for PPE implementation. In exploratory aims, the investigators will examine the stability of group differences, treatment completion rates, the role military sexual trauma history, and treatment mechanisms.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Post-9/11 Veteran Enrolled in VHA
- 1 \> mo stable medication
- Committed relationship 6+ months
- DSM-5-R PTSD Diagnosis
Exclusion criteria
- Imminent suicidality/homicidally
- Mania, psychosis, or severe substance use disorder, past 3 mos
- Severe cognitive impairment
- Severe intimate partner violence in last 6 months
- Fear of or intimidation by partner
- Partner screens positive for PTSD
Where
- Phoenix, Arizona
- San Diego, California
- Minneapolis, Minnesota
- Charleston, South Carolina
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Nov 14, 2025 · Source of record for eligibility and locations