Cardiology Board Review statistics: Difference between revisions
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==[[Negative Predictive Value]]== | ==[[Negative Predictive Value]]== | ||
Proportion of people with a negative test don't have the disease. If the prevalence of disease is low, this is helpful (atypical CP and a negative [[stress test]]). | Proportion of people with a negative test don't have the disease. If the prevalence of disease is low, this is helpful (atypical CP and a negative [[stress test]] rules out the disease). | ||
==Whether Treatments Work== | ==Whether Treatments Work== | ||
Revision as of 15:17, 29 September 2012
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Incidence
New cases per year or over a period of time
Prevalence
How many people have the disease at a snapshot in time
Diagnostic Tests
Sensitivity
Specificity
False Positive
Don't have the disease, but test indicates they do
False Negative
Have the disease, but tests says they don't
Positive Predictive Value
Proportion of people with disease who have a positive test. If you have a low prevalence of disease, this may be low. If you have a prevalent disease, this will often be positive.
Negative Predictive Value
Proportion of people with a negative test don't have the disease. If the prevalence of disease is low, this is helpful (atypical CP and a negative stress test rules out the disease).