00:01
So, i see that you need help with this question.
00:02
It says, if we are faced with an outbreak and would gather, and would like to gather evidence quickly after initial assessment, we would probably want to do a case control study.
00:19
Okay? for an initial screening test for a rare condition should have high specificity.
00:29
If a test when repeated several times gives wide varying answers, it is imprecise.
00:39
An epidemiologist wants to ensure that results found in a particular group of participants would also be true for other participants in other places.
00:48
If a study can do this, we can say that the study has a high level of generalizability, which is not one of the criteria for confounding.
01:01
So, that is a confounder can be intermediate step in a casual pathway from exposure to outcome.
01:17
510, in principle, a randomized control trial eliminates extraneous differences in the populations being compared so that the effect of the exposure of interest can be assessed...