Brief Peer-Supported webSTAIR for Trauma-Exposed Veterans in the Community: Randomized Controlled Trial.

ABSTRACT

BACKGROUND: Peer-supported mobile health (mhealth) programs hold the promise of providing a low-burden approach to increasing access to care and improving mental health. While peer support has been shown to improve engagement into care, there is limited investigation about the impact of peers on symptom outcome. Trauma-exposed populations frequently suffer from co-occurring posttraumatic stress and depressive symptoms as well as difficulties in day-to-day functioning. This study evaluated the potential benefits of a peer-supported transdiagnostic mhealth program on symptom outcomes and functioning. OBJECTIVE: This randomized controlled trial tested the effectiveness of Brief Peer-Supported (BPS) webSTAIR, a 6-module transdiagnostic online program derived from Skills Training in Affective and Interpersonal Regulation (STAIR) compared to waitlist control (WL) in a community sample of Veterans who screened positive for either post-traumatic stress disorder (PTSD) and/or depression. METHODS: A total of 178 eligible Veterans were enrolled in the study using a 21 randomization scheme with 117 assigned to BPS webSTAIR and 61 assigned to WL. PTSD and depressive symptoms as well as emotion regulation, and psychosocial functioning were assessed via phone at pretreatment, posttreatment, and 8-week follow-up. Mixed-effects models were used to assess change in outcome measures across timepoints and evaluate the impact of module completion on outcomes. Exploratory analyses were conducted to determine whether the type and number of peer interactions influenced outcomes. RESULTS: Significant interaction effects were observed for all outcomes such that participants randomized to BPS webSTAIR reported significantly greater improvement at posttreatment compared to WL with moderate effect sizes for PTSD (PCL-5 d = -0.48) depression (PHQ- 8 d = -0.64), emotion regulation (DERS-16 d = 0.61) and functional impairment (WSAS d = 0.61); gains were maintained at 8-week follow-up. Those who completed more modules reported greater improvement on all outcomes. An initial cohort of participants who were required to engage with a peer coach to progress through the modules interacted more frequently with peers but completed fewer modules compared to a later cohort for whom peer engagement was optional. CONCLUSIONS: BPS webSTAIR was effective in improving PTSD and depression symptoms, emotion regulation, and psychosocial functioning in community Veterans. Peer-supported transdiagnostic mhealth programs may be a particularly efficient, effective, and low-burden approach to improving mental health among trauma-exposed populations. Investigation of peer-supported programs among other populations is necessary to evaluate the generalizability of the findings. Analyses comparing peer support that was required versus optional indicated that some veterans may not need or want peer support. Future research should evaluate how best to deliver peer support and for whom it is most beneficial. If successful, peer-supported tech programs may increase the VA workforce as well as improve veteran mental health services and outcomes. CLINICALTRIAL ClinicalTrials.gov NCT04286165.