Two-by-two risk comparison audit
StatMedAnalysis | 30 October 2026 | Blank research worksheet

Purpose: Confirm each cell represents unique participants over the same risk window.
Use project-level or aggregate information only, never participant identifiers. This is a planning aid, not a validated instrument.

1. Study / extraction ID (no personal identifiers):


2. Outcome definition and direction of benefit:


3. Risk window and start of follow-up:


4. Group A events a / non-events b:


5. Group B events c / non-events d:


6. Check totals: a+b and c+d against report:


7. Population / exclusion and missing-outcome rules:


8. Independent, paired, or clustered design?:


9. Any zero or sparse cells?:


10. Unadjusted estimate versus reported adjusted estimate:


11. Original source page/table and extractor:


12. Independent check, discrepancies and resolution:


Related guides and tools: https://www.statmedanalysis.com/resources