unit 7 answers - Unit 7 Bias Questions and Answers...

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Unit 7- Bias Questions and Answers Epidemiology 6000 Question 1 Bias is often defined as any systematic error that occurs in a study. This systematic error may occur… A. In the design phase of the study B. In the conduct of the study C. In the analysis of the study D. All of the above Question 2 Misclassification occurs when we incorrectly group participants based on … A. Exposure status B. Disease status C. Neither D. Exposure and/or disease status Question 3 When differential misclassification occurs, in which direction will the measure of effect be biased? Bias may occur toward or away from the null when misclassification is differential. Select the error that would most likely result from the following: Question 4 In a case-control study examining breast cancer and estrogen use, cases were selected from local public hospitals while controls were selected from private doctor’s offices that had treated women for other breast conditions (plastic surgery, non-malignant conditions). A. Selection bias B. Differential misclassification C. Non-differential misclassification D. None of the above Question 5 Select the error that would most likely result from the following: In a case-control study of the relation between work exhaustion and asthmatic attacks, cases are more likely than controls to over-report the amount of exhaustion due to work. A. Selection bias
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unit 7 answers - Unit 7 Bias Questions and Answers...

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