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Independent event review may lose its intended protection if treatment information appears in documents or event packages differ systematically between arms. What reviewers see matters alongside whether their organisational role is independent.
Define the question and assumptions
Prespecify event definitions, referral triggers and the document package. Reduce unnecessary treatment clues without removing clinical context needed for a defensible decision. Define masking procedures, completion of incomplete packages and the route through which adjudicators can request clarification while preserving the intended information boundaries.
Hypothetical study example
In a hypothetical trial, an event report heading reveals treatment assignment. The team introduces controlled masking for future packages and assesses the implications of information already seen. Original decisions are retained; any reassessment records its rationale, document version and resulting changes rather than overwriting history.
Design review checks
- Check that the same event referral triggers apply to all treatment groups.
- Test packages for unnecessary treatment clues and missing clinically relevant context.
- Track initial decisions, clarification requests and final decisions as separate steps.
Record the decision and its limits
An acceptable process lets an independent reviewer connect each decision to its supporting package. Adjudication cannot automatically repair missing or biased event collection. Unreferred potential events and package preparation differences need separate assessment; the existence of a committee alone does not establish absence of bias.
Frequently asked questions
- Should all treatment-related information be removed?
- Reduce unnecessary clues while retaining clinical context needed for the decision.
- Does an independent committee solve missing data?
- No. Incomplete referral and inadequate documentation require separate controls.