Under what circumstances may a participant's trial participation be terminated?

• A. Foreseeable circumstances and/or reasons for termination.
• B. Only by participant withdrawal.
• C. If the participant misses a visit.
• D. Never terminate early.

Answer: (A)

The important idea is that a participant’s involvement can end when there are foreseeable reasons to stop, not just because the participant chooses to withdraw. In GCP, termination of participation can occur for safety concerns, new information about risks, protocol or administrative changes, sponsor or regulatory decisions, or other circumstances that affect the ethics or integrity of the trial. A participant may withdraw at any time, but the trial itself can also be terminated early for reasons beyond a single participant’s decision. Missing a visit by itself does not constitute termination. Therefore, the correct understanding is that participation may be terminated for foreseeable circumstances and/or reasons.