# Bayes' theorem

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## Bayes’ theorem

Simplistically, Bayes’ theorem is a formula which allows one to find the probability that an event occurred as the result of a particular previous event. It is often used in medicine to determine the mathematical relationship between the probability that an individual has a disease, X, before the test is run, to the probability that the individual has the disease after the test result is known.Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

## theorem

(the'o-rem) [Gr.**theorema**, principle arrived at by speculation]

A proposition that can be proved by use of logic, or by argument, from information previously accepted as being valid.

### Bayes' theorem

See: Bayes' theorem.Medical Dictionary, © 2009 Farlex and Partners

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