Telehealth 2.0: Evaluating Effectiveness and Engagement Strategies for CPT-Text for PTSD

The COVID-19 pandemic has exacerbated mental health challenges for trauma-exposed individuals due to increased isolation, insufficient capacity in the mental health workforce, and a predicted fourth wave of mental health impacts of the pandemic itself. There is a pressing need to increase treatment capacity. Digital mental health (DMH) interventions for posttraumatic stress disorder (PTSD) address well-documented barriers to traditional in-person psychotherapy or telehealth delivery of evidence-based treatments (EBTs) for PTSD, but many consumers do not remain engaged. Thus, acceptable, efficient, and engaging forms of EBTs are sorely needed, particularly for those who are less likely to access traditional psychotherapy or use online programs. Asynchronous texting therapy platforms may facilitate treatment engagement among those who seek discrete, convenient, and affordable support. In a pilot study of a texting-based format of an EBT for PTSD, Cognitive Processing Therapy (CPT-Text), CPT-Text was feasible to deliver, and clients showed substantially greater PTSD symptom improvement over a shorter time compared to text therapy as usual (TAU). A larger scale, more rigorous test is necessary. This is a randomized, Hybrid Type 1, effectiveness-implementation trial with a factorial design to compare text-based therapies for PTSD utilizing the HIPAA-compliant secure texting platform of our DMH partner, Talkspace. Participants will be enrolled in the study once they have consented, and competed the initial assessment, and determined to meet eligibility requirements. The study team will randomize participants (N= 360) who have PTSD that is related to, has been exacerbated, or developed during the COVID-19 pandemic into CPT-Text or text-based Culturally Informed Trauma Treatment As Usual (CITT). After approximately a week of onboarding with their therapist (e.g., introduction, establishing treatment goals, etc), the active texting intervention will begin and assessments will occur at established timepoints through 24 weeks after the active intervention begins. Active interventions will occur over the course of 12 weeks. Participants will also be randomized into one of two engagement strategies: therapist reminder as usual (RAU) or RAU + incentive (RI). The study will examine an innovative incentive structure in which the study will "pay it forward" by offering free or discounted therapy to other individuals with PTSD when participants remain engaged. The study will compare the impact of an engagement strategy on treatment response and engagement, and will examine motivation as a potential mechanism. The study will also evaluate a novel Natural Language Processing (NLP) or Large-Language Model (LLM) based approach to assessing CPT-Text fidelity. This study will (1) provide critical information about how to promote sustained DMH engagement using unique incentive strategies and moderators of engagement and outcomes and (2) offer first guidance on supporting quality and fidelity of messaging-based EBTs using computational methods.