Lack of randomization, A major problem resulting from the

Lack of randomization

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Reference no: EM1395053

A major problem resulting from the lack of randomization in a cohort study is: the possibility that a factor that led to the exposure, rather than the exposure itself, might have caused the disease (correct answer).

Why is the following NOT considered a correct choice for the answer to the question? (The possibility that a smaller proportion of people in the study may have been exposed).

Reference no: EM1395053

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