b*******n
发帖数: 605 | 1 Suppose case = lung cancer (y), and exposure = smoking rate (x).
In case control study, which also is called retrospective study, the
probability for smoking rate given lung cancer, p(x=1|y=1), is available, but
you might want to know the chance of getting lung cancer if people smoke. In
order to estimate it, which is p(y=1|x=1) in your statement, you have to know
the rate of smoking people in the population p(x), and the incidence of lung
cancer in the population. Then, using conditional prob |
|
