Question

One of the reasons that cohort studies provide a stronger evidence than cross-sectional studies is: A....

One of the reasons that cohort studies provide a stronger evidence than cross-sectional studies is:

A. That risk can be calculated directly.

B. They start with diseased and non-diseased groups.

C. They examine prevalence data.

D. They are retrospective.

Math   Statistics-And-Probability   
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