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Dental General 34ebd834

Retrospective cohort studies are characterized by all the following except:

A
The study groups are exposed and non-exposed.
B
Incidence rates are compared.
C
The required sample size is smaller than that needed for a concurrent cohort study.
D
The required sample size is similar to that needed for a concurrent cohort study.
High-Yield Explanation
No explanation provided.
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