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28-05-2024
Health

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In a study on the effect of aspirin on prevention of myocardial infarction, subjects are randomly assigned to two groups. Group 1 receives aspirin, and group 2 receives placebo. Some subjects in group 2, however, consume aspirin unknowingly, because many over-the-counter medications include aspirin. This problem is best described by which term?

A) Stratification
B) Type II error
C) Selection bias
D) Drop-ins

Answer :

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