Feasibility of recruiting in prisons during a randomized controlled trial with people with serious mental illness

Background: Successful participant recruitment is vital to the feasibly of intervention research. In the behavioral and social sciences, intervention researchers face a myriad of recruitment barriers, many of which stem from working in real-world settings and among hard-to-access populations. Optimizing recruitment efforts requires being intentional about study planning and resource allocation, carefully documenting the outcomes of recruitment efforts, and developing and implementing procedures and strategies to overcome anticipated recruitment barriers. Methods: The current article presents recruitment flowcharts to illustrate (a) the multistep recruitment process and (b) the points of potential participant attrition during recruitment from a two-phase group-based intervention study conducted among individuals with serious mental illness incarcerated in a state prison system in the U.S. In addition, qualitative methods are used to examine strategies employed during the study to support recruitment efforts. Results: Despite challenges, this study was able to achieve recruitment goals. Analyses found the majority of potential participant attrition occurred prior to informed consent, highlighting the need for studies to track recruitment efforts in more detail than is currently recommended by commonly used guidelines. Strategies to optimize recruitment efforts included maximizing recruiter availability, developing a responsive communication approach, demonstrating respect for facility procedures and operations, and ensuring peak preparedness. Conclusion: Careful documentation of recruitment efforts and the early deployment of recruitment strategies is vital to the feasibility of intervention studies conducted in real-world settings with hard-to-access populations. The publication of recruitment procedures and outcomes can help future researchers anticipate recruitment challenges and inform recruitment goals, timelines, and strategies.