ESTRO Multidisciplinary Management of Breast Cancer 2017

What is incidence?

• Incidence: number of new cases arising in a given time period in a specified population. Collected routinely by cancer registries. • Distinguish from prevalence : number of persons in a specified population who have been diagnosed with a disease, and who are still alive on a particular date , eg cancer survivors • Incidence rate : eg number of cases diagnosed per 100,000 persons per year.

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