The words incident, incidence, and instance may seem similar (and, in fact, incident and incidence are closely related), but they are applied in different ways. In current use, incidence usually means "rate …

INCIDENCE definition: the rate or range of occurrence or influence of something, especially of something unwanted. See examples of incidence used in a sentence.

Incidence should not be confused with prevalence, which is the proportion of cases in the population at a given time rather than rate of occurrence of new cases.

Definition of incidence noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Mar 4, 2026 · Offering a helpful definition of incidence in epidemiology, the National Center for Health Statistics (NCHS) describes this as the "number of cases of disease having their onset during a …

INCIDENCE definition: 1. the rate at which something, especially a disease, happens: 2. the fact of a ray of light…. Learn more.

Aug 12, 2022 · Measuring incidence may be complicated because the population at risk for the disease may change during the period of interest due to births, deaths, or migration, for example.

The incidence of something bad, such as a disease, is the frequency with which it occurs, or the occasions when it occurs.

Incidence specifies the number of new diagnoses for the at-risk population of a disease. Changing the specified population will also change the incidence. For example, the incidence of stroke is …

incidence, in epidemiology, occurrence of new cases of disease, injury, or other medical conditions over a specified time period, typically calculated as a rate or proportion.