When selecting controls for a case-control study, all of the following are consi

Question

When selecting controls for a case-control study, all of the following are considerations except: Controls should estimate the distribution of exposure in the source population Controls should be sampled independently of exposure status Controls need to be representative of at risk population. Controls should not have the same exposure prevalence as the cases None of the above. All of the following are challenges of using population based controls except: Expensive Time consuming Recall of past exposures limited When cases are selected from a specialized hospital, it may not clear from what population they arose. None of the above.

Explanation / Answer

25: The control for the case control study should estimate the distribution of exposure in the source population and should be sampled independently of exposure status. It should be representative of at risk poulation and should not have same exposure as cases.
Correct answer is e: None of above.

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