probability of false positive
1-specificity
likelihood ratio
sensitivity/ (1-specificity)
what is p value
chance that H0 is rejected by mistake
type I error
rejecting H0 when true
type 2 error
accepting H0 when false
ARR
%placebo - %tx
NNT
1/ARR (1 / %placebo - %tx)
relative risk ratio formula
(exposed with dz/ exposed total) / (unexposed with dz/ unexposed total)
odds ratio
(exposed cases/unexposed cases) / (exposed controls/unexposed controls)