Prevalent
Prevalent
Prevalent (/prɛvələnt/), from the Latin word "praevalentia", meaning "having power or influence", is a term used in medicine and epidemiology to describe the commonness or widespread occurrence of a disease or condition in a particular population or area at a particular time.
Definition
In epidemiology, prevalence is a measure of disease frequency. It is calculated by dividing the number of existing cases by the total population, and it is often expressed as a percentage. Prevalence is a statistical concept referring to the number of cases of a disease that are present in a particular population at a given time.
Types of Prevalence
There are two types of prevalence: point prevalence and period prevalence.
- Point prevalence refers to the proportion of a population that has a disease or condition at a specific point in time.
- Period prevalence refers to the proportion of a population that has a disease or condition over a specific period of time.
Related Terms
- Incidence - The number of new cases of a disease that occur in a specific population during a specified period.
- Morbidity - The state of being diseased or unhealthy within a population.
- Mortality - The death rate within a population.
See Also
External links
- Medical encyclopedia article on Prevalent
- Wikipedia's article - Prevalent
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