When a subject withdraws due to safety concerns, which data should be documented?

• A. The date of withdrawal
• B. The sponsor's budget impact
• C. The plan for re-consent
• D. The reason for withdrawal and the last assessment results

Answer: (D)

When safety concerns lead to a participant withdrawal, the most important data to capture are why they are withdrawing and what their last assessment showed. Recording the reason explains the safety signal and helps determine whether it’s related to the study, while the last assessment results provide a clear status at the time of withdrawal for accurate safety reporting and interpretation of the data. The sponsor’s budget impact or plans for re-consent aren’t the data needed to document this safety withdrawal, and while the withdrawal date is relevant, the reason and the most recent results are the key information for understanding the safety event.