Question

12. In a case-control study, misclassification due to recall bias may be termed:
    1. differential.
    2. non-differential.
    3. random.
    4. Two of these are correct.

Answer 1

A.Differential- Misclassification due to recall basis can be termmed as differntial misclassification.If there is systemic differences in the report exposures or oucomnes,recall bias will occur.In case control studies or retrospective cohort studies recall bias can occurl.Probability of being misclassified vary across the groups when differential misclassification occurs.

B,C.Incorrect-When the probability of individuals being misclassified is equal across all groups in the study is called Non-differential misclassification.Non-differential is also called as random misclassification

D.Incorrect- Correct option is A