How do you distinguish a deviation from a violation?

• A. Deviation is typically a minor, non-safety-impacting departure; a violation breaches the protocol and may affect safety or data integrity.
• B. Deviation is more serious than a violation.
• C. Violation is a minor symptom of noncompliance.
• D. Deviation always requires immediate termination of the study.

Answer: (D)

Distinguishing factor: safety and data impact plus regulatory significance. A deviation is a minor departure from the protocol that does not affect participant safety or data integrity; it is typically documented, monitored, and corrected without altering the study’s overall conduct. A protocol violation is a more serious breach that may compromise safety, rights, welfare, or data integrity, and it requires escalated investigation, reporting, and potentially regulatory action or corrective measures.

In practice, you’d see a deviation for something like a missed visit window or a minor data-entry error that doesn’t change outcomes. A violation would involve a significant breach, such as enrolling an ineligible participant or performing a procedure outside the approved protocol. That’s why the best description is that deviations are minor departures, while violations breach the protocol and may affect safety or data integrity. The idea that deviations always require immediate termination is not correct.