Lack of Randomization

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).

Hi,

Interesting question! Let’s take a closer look.

1. 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. 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 …

Regarding a multiple choice question about the major problem resulting from the lack of randomization in a cohort study, this solution explains why one answer is the correct answer (e.g., the possibility that a factor that led to the exposure, rather than the exposure itself, might have caused the disease), whereas the other answer is not the correct answer (e.g., the possibility that a smaller proportion of people in the study may have been exposed).