Defined term · Evidence assessment
Risk of bias
The extent to which features of a study’s design or conduct could produce an effect estimate that systematically departs from the truth. Assessed at the level of the individual study and carried into…
§1Risk of bias
§1.1Also known as
Study limitations
§1.2Category
Evidence assessment — Terms describing how the Institute judges and reports the strength of evidence.
§1.3Related terms
- Allocation concealment — The prevention of foreknowledge of the next allocation by the person enrolling a participant. Distinct from blinding, which concerns knowledge after allocation, and…
- Blinding — The withholding of knowledge of assignment from participants, investigators, outcome assessors or analysts. The Institute records who was blinded rather than describing…
- Attrition — Loss of participants from a trial before its primary analysis timepoint. Differential attrition between arms threatens the comparability that randomisation established.
Compound Evidence Institute · CEI-GT-010 · https://compoundevidence.com/glossary/risk-of-bias/ · retrieved 30 July 2026