Patient Recruitment & Retention
Patient recruitment and retention are critical to maintaining clinical trial timelines, enrollment targets, and study continuity. Protheragen supports research sites and study teams with structured recruitment planning, participant coordination, follow-up support, and ongoing communication throughout the study lifecycle.
Our approach integrates site-level recruitment activities with protocol requirements, participant needs, and study timelines. By improving coordination and visibility across recruitment and follow-up activities, Protheragen helps study teams identify potential participants, support enrollment, maintain participant engagement, and reduce avoidable loss to follow-up.
Introduction to Patient Recruitment & Retention
Successful clinical trials depend not only on activating qualified sites, but also on identifying and enrolling eligible participants and maintaining their engagement throughout the study. Recruitment delays or high participant attrition can affect enrollment timelines, increase study costs, and reduce the amount and completeness of data available for analysis.
Patient recruitment involves activities that support the identification, pre-screening, and enrollment of potentially eligible participants in accordance with the approved protocol and applicable requirements. Retention extends beyond enrollment and includes participant follow-up, visit coordination, communication, and practical support intended to facilitate continued participation through study completion.
Figure 1. An Infographic of the clinical trial pathway developed using an interpretive analysis. (Roberts NA, et al., 2025)
Our Services
Patient recruitment and retention require a coordinated, lifecycle-driven approach that combines strategic planning, effective subject identification, continuous engagement, and long-term follow-up support. At Protheragen, we work closely with research sites to develop and implement integrated solutions that improve enrollment efficiency while ensuring sustained participant involvement throughout the clinical trial. Our services are structured to support each critical stage of the recruitment and retention process.
Effective recruitment begins with a well-structured strategy. Our recruitment planning services help research teams define realistic enrollment goals, identify target populations, and develop tailored recruitment approaches aligned with protocol requirements and study timelines.
We support sites in building practical recruitment frameworks that improve efficiency, reduce delays, and enhance overall study feasibility.
Successful enrollment requires more than outreach-it requires structured subject identification and management throughout the screening and enrollment process. We assist sites in managing recruitment workflows, tracking potential participants, and supporting eligibility assessment processes.
Our goal is to help research teams maintain a steady recruitment pipeline while ensuring compliance with protocol-defined inclusion and exclusion criteria.
Maintaining participant engagement throughout the study is essential for data integrity and trial success. We provide structured follow-up support to help ensure subjects remain compliant with visit schedules, protocol requirements, and study procedures.
This service helps reduce drop-out rates, improve data completeness, and maintain consistent subject participation across the entire study duration.
Clear and consistent communication with study participants plays a key role in retention and protocol adherence. We support research sites in maintaining effective communication channels with subjects, ensuring they remain informed, engaged, and supported throughout the clinical trial.
By improving communication quality and responsiveness, we help strengthen participant trust and long-term retention outcomes.
A Coordinated Recruitment & Retention Process
Participant-Centered Engagement
Participant engagement should be considered throughout the clinical trial rather than only at enrollment. Practical barriers such as scheduling, communication, travel requirements, visit burden, and limited understanding of study procedures may influence continued participation.
Protheragen supports study teams by helping coordinate participant-facing activities and identifying operational barriers that may affect engagement. Where appropriate and permitted by the study design, communication tools and digital approaches can be incorporated into recruitment and retention workflows.
Research on digital recruitment and retention has evaluated approaches including websites, social media, email, text messaging, and other electronic tools. However, evidence varies by study population and intervention, emphasizing the importance of selecting approaches according to the study context rather than applying a single recruitment strategy universally.
Recruitment & Retention Quality Management
Protheragen can support ongoing visibility of recruitment and retention performance through structured tracking and reporting.
Recruitment Metrics
- Number of potential participants identified
- Number of participants pre-screened
- Number screened
- Screening-to-enrollment conversion
- Enrollment rate
- Enrollment progress versus target
- Recruitment source performance
- Site-level recruitment performance
Retention Metrics
- Participant retention rate
- Follow-up completion rate
- Missed visit rate
- Visit rescheduling rate
- Loss-to-follow-up rate
- Participant withdrawal rate
- Follow-up completion by site
- Outstanding participant-related activities
These metrics can help study teams identify recruitment bottlenecks, emerging retention risks, and differences in site performance.
Why Choose Protheragen
- End-to-end recruitment and retention support
- Patient-centric engagement strategies
- Improved enrollment efficiency and study timelines
- Reduced dropout and improved subject compliance
- Strong alignment with protocol and regulatory requirements
- Experienced clinical operations support team
Successful clinical trials depend on effective patient recruitment and long-term retention. Efficient patient recruitment and strong retention strategies are essential for minimizing study delays and ensuring high-quality clinical data. Protheragen is committed to supporting research sites with tailored strategies that improve enrollment efficiency and participant engagement. Contact us to learn how our patient recruitment & retention solutions can support your clinical research programs.
Reference
- Roberts NA, et al. "How to Support Participants in Urogenital and Prostate Clinical Trials: A Qualitative Perspective". Psychooncology. 2025; 34(7):e70214.