Glossary Term

SIR

Standardised Incidence Ratio (SIR) is an epidemiological measure comparing the observed number of disease cases in a study population to the expected number based on reference population rates.

Illustration representing SIR
Listen to definition
Related terms
DALY YLL GBD
Further reading
Watch related video CDC: What is the SIR? Browse the HEOR resource database

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Media Kit · Q2 2026

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