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Re: st: diagt and accuracy
Oops, the first line was cut off.
I meant to write that diagt defines accuracy as (sensitivity+specificity)/2.
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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