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Definition of Specificity

Specificity: 1. The quality of being specific as, for example, she showed the use of specificity in her diagnosis. 2. The proportion of persons without a disease who are correctly identified by a test. The specificity is the number of true negative results divided by the sum of the numbers of true negative plus false positive results.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=25530
Last Editorial Review: 6/14/2012

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