01
Establish which versions you have.
Identify the study, original protocol, amendments, dates and source locations. Record gaps in the sequence. A registry edit and a formal protocol amendment are different records; do not silently treat them as equivalent.
02
Separate the change from the explanation.
Show the earlier and later wording for the same criterion, endpoint or assessment. Record a documented amendment reason only where a source supplies it. If the reason is absent, leave it unknown. A plausible interpretation is still an interpretation.
03
Ask whether the precedent applies.
Examine the population, design, procedure and operational setting. Invite the specialists needed for the current decision. A change in another study neither proves an earlier mistake nor establishes the right choice for this one.
04
Keep the decision and the remaining questions.
Record the evidence examined, concerns, alternatives, response and rationale against the exact draft. Do not claim improved recruitment or reduced burden merely because an amendment came before a change in performance. Outcome claims need suitable evidence and analysis.
Keep the reasoning in view.
Original protocol → attributable change → documented reason or explicit gap → applicability review → recorded decision
Use this discussion framework with the evidence and information from your study. The accountable study team decides which sources and questions apply.
See this review approach in a connected example →