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st: diagt and accuracy

From   Heather Gold <[email protected]>
To   [email protected]
Subject   st: diagt and accuracy
Date   Wed, 08 Jun 2005 13:03:30 -0400

Has anyone heard of accuracy defined as (prevalence*sensitivity+(1-prevalence)*specificity) ? This is like a weighted average that incorporates prevalence and might be helpful with a dichotomous diagnostic test (ie, rather than ROC). If so, is there a standard depending on one's field, eg, medicine?


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