HSC 404 - Final Exam (Ch 9, 10, 11, 12, 13, 15, 16) Questions with 100% Verified Correct Answers

HSC 404 - Final Exam (Ch 9, 10, 11, 12, 13, 15, 16) Questions with 100% Verified Correct Answers The strategy which is not aimed at reducing selection bias is: A. Development of an explicit case definition B. Standardized protocol for structured interviews C. Enrollment of all cases in a defined time and region D. Encouragement of high participation rates - Correct Answer D Recall bias is most likely to occur in: A. Case control studies B. Prospective cohort studies C. Experimental studies D. All of the above E. None of the above - Correct Answer A The purpose of a double-blind study is to: A. Reduce the effects of sampling variation B. Avoid observer bias and sampling variation C. Achieve comparability of cases and controls D. Avoid observer and interviewee bias E. Avoid interviewee bias and sampling variation - Correct Answer D In a study to determine the incidence of 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. Hawthorne Effect C. Selection bias: survival bias