fncEBMPostTest: Computes post test probability to have a dissease based on the pre-test probability and the likelihood ratio of the diagnostic test
Description
This dialog box permits you to define the probability of a patient to have a disease
before performing a diagnostic test (pre-test probability), and the likelihood ratio
of the diagnostic test. Based on these two, the post-test probability to actually
have the disease is computed.
This is computed the following way:
pre-test odds <- pre-test probability / (1 - pre-test probability)
post-test odds <- pre-test odds * likelihood ratio
post-test probability<- post-test odds / (post-test odds + 1)