Improving Access to Child and Youth Addiction and Mental Health Services in New Brunswick: Implementing One-at-a-Time Therapy Within an Integrated Service Delivery Model

This study examines the process of implementing One-at-a-Time (OAAT; i.e., single-session) therapy into child and youth addiction and mental health services in New Brunswick. The implementation process was retrospectively mapped onto implementation science frameworks. Providers were recruited to participate in research associated with the system change, and completed surveys to assess readiness for implementation. Client satisfaction and system-outcomes were measured through surveys and system indicators, respectively. Key implementation considerations included age of consent for services, implementation within an integrated service delivery model, and mapping the client journey to conceptualize changes in service delivery. Providers (N = 214) felt that OAAT therapy was acceptable and appropriate to implement into practice, and would lead to observable short-term outcomes. During the implementation (April–December 2022), 2266 sessions were delivered, resulting in a 62% waitlist reduction. Most clients who completed the satisfaction survey (N = 518) reported benefit. This study elucidates the successful implementation of OAAT therapy for children and youth, and can serve as a heuristic for comparable practice change initiatives.