Which of the following can introduce selection bias in a case control study?
a) Differential recall about exposure by the cases
b) Collecting data differently from the exposed and unexposed
c) Inclusion of controls not representative of the target population
d) Systematic distortion of the truth by the study participants
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Answer:
Selection bias can be introduced into case-control studies with low response or participation rates if the likelihood of responding or participating is related to both the exposure and the outcome.
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Answer:
Inclusion of controls not representative of the target population
Explanation:
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