What is Enrollment?

Enrollment in a clinical trial is the process of identifying, screening, and officially registering eligible participants into a study. It begins after a participant meets the study’s inclusion and exclusion criteria and gives informed consent. Once enrolled, the participant is assigned a unique study ID and can start receiving the trial-related procedures or treatment as defined in the study protocol.

Enrollment is used during the active phase of a clinical trial, after participants have been screened and confirmed as eligible. It helps trial teams formally register participants and track their progress across study sites. During study conduct, enrollment supports planning and coordination of study visits, treatment administration, and follow-up activities. It is also used to monitor recruitment pace, manage site-level targets, and maintain accurate participant records. Clear visibility into enrollment status helps ensure participants are properly documented and managed throughout the trial. Patient enrollment data further supports consistent oversight and smooth day-to-day trial operations.

Clinion supports enrollment by streamlining the transition from screening to active study participation. The system ensures only eligible participants can be enrolled, reducing manual errors and duplicate entries. Enrollment actions are logged automatically, creating a clear audit trail. Clinion also links enrollment directly with subject records, visit schedules, and study activities, helping sites manage participants smoothly and maintain accurate, up-to-date enrollment information throughout trial execution.

In practice, enrollment happens when a site user confirms a screened participant’s eligibility and formally adds them to the study in the system. The participant is assigned a unique study ID, and their status changes from screened to enrolled. Once enrolled, scheduled study visits and required activities become active and visible to the site team. Enrollment details are recorded automatically, allowing teams to track participant progress and manage study tasks without manual follow-ups.

Recruitment

Screening Period

Eligibility Criteria

Site

CTMS

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CTMS