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Compound Evidence InstituteEvidence synthesis · established 2023Graded assessments of compounds, trials, methods and supply
Document set current to 30 July 2026
Defined term · Statistics and inference

Fixed-effect model

A pooling model assuming a single true effect common to all contributing studies. Appropriate only where that assumption is defensible.

Document identifier
CEI-GT-076
Series
Defined term
Version
1.0
Published
30 Jul 2026
Last reviewed
30 Jul 2026
Certainty
Not rated

§1Fixed-effect model

§1.2Category

Statistics and inference — Terms describing how effects are estimated and how uncertainty is expressed.

§1.3Related terms

  • Random-effects model — A pooling model assuming that true effects vary across studies and estimating their distribution. Produces wider intervals than a fixed-effect model and gives relatively…
Compound Evidence Institute · CEI-GT-076 · https://compoundevidence.com/glossary/fixed-effect-model/ · retrieved 30 July 2026
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