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Which epidemiologic tool is least likely to be useful in the conduct of a retrospective cohort...

Which epidemiologic tool is least likely to be useful in the conduct of a retrospective cohort research study?

A.case ascertainment

B. ascertainment of outcomes

C. statistical analysis

D. surveillance

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Answer #1

Ascertainment of outcome is least likely to be useful as in retrospective cohort study, outcome in the form of disease among individuals is already known , only exposure to certain risk factor has to ascertained.

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