Glossary Term

Prevalence

Performance MetricsEN

Definition

The ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population.

Extended Notes

Source: National Cancer Institute, NCI Thesaurus 26.09d, C17010. NCI definition, reproduced without modification under CC BY 4.0. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.

Also Known As

Prevalence