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In a study to determine the incidence of a chronic disease, 150 people were examined at the end of a three-year period. Twelve cases were found,...

In a study to determine the incidence of a chronic disease, 150 people were examined at the end of a three-year period. Twelve cases were found, giving a cumulative risk of 8%. Fifty other members of the initial cohort could not be examined; 20 of these 50 could not be examined because they died. Which source of bias may have affected the study?

A. Information bias: interviewer/abstractor bias

B. Information bias: recall bias

C. Selection bias: survival bias

D.Hawthorne effect

Top Answer

The correct answer is C.... View the full answer

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