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Chapter 9. Case-Control Studies

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In a case-control study, the individuals with the disease of interest are limited to those who are newly diagnosed. We may describe these cases as

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A. hospital based.

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B. prevalent.

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C. incident.

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D. population based.

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E. none of the above.

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In a hospital-based case-control study, which of the following guidelines may be useful in sampling controls?

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A. Choose them from a single diagnostic category

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B. Choose them from a variety of diagnostic groups

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C. Choose them from chronic conditions

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D. Choose them from acute conditions

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E. A and C

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F. B and D

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In a case-control study, matching may be performed to select controls in order to

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A. control confounding.

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B. control selection bias.

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C. improve statistical precision.

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D. increase the strength of association.

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E. A and C.

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F. B and D.

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In contrast to a prospective cohort study, a case-control design may be preferred for the study of

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A. rare exposures.

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B. rare diseases.

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C. shorter latent periods.

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D. long latent periods.

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E. A and C.

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F. B and D.

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The preferred measure of association in a case-control study is the

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A. risk ratio.

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B. rate ratio.

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C. odds ratio.

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D. attributable risk.

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E. attributable risk percent.

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Increasing the number of controls per case in a case-control study tends to reach diminishing returns in terms of increasing statistical power beyond what ratio?

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A. 0.5 controls per case

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B. 1.0 control per case

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C....

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