Measures of association

​Topic 5 Measures of association

By Patricia Lee

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What are the features of a cohort study?

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What are the features of a cross-sectional study?

Multiple Select

What are the features of a case-control study? Select all that apply.

• Prospective timing

• Retrospective timing

• grouping by exposure

• Grouping by outcome

• RR used for measure of association

Multiple Choice

A study investigated the association between a type of cancer and an environmental exposure. The study found that 155 of of 200 cancer patients, and 155 of 400 in the non-cancer group, were exposed to the environmental exposure. What was the study design used in this scenario?

• Cross-sectional study

• Case-control study

• Retrospective cohort study

• Prospective cohort study

• Intervention study

Multiple Choice

In an industry employing 10,000 people, 2,500 were employed in areas where they were exposed to ionising radiation, while the remaining 7,500 were not exposed.  At the beginning of the study, all employees were free of disease. The entire population of 10,000 was followed for 10 years to determine whether exposure to radiation increased the risk of developing a particular disease.  What was the study design used in this scenario?

• Cross-sectional study

• Case-control study

• Retrospective cohort study

• Prospective cohort study

• Intervention study

Multiple Choice

In an industry employing 10,000 people, 2,500 were employed in areas where they were exposed to ionising radiation, while the remaining 7,500 were not exposed.  At the beginning of the study, all employees were free of disease. The entire population of 10,000 was followed for 10 years to determine whether exposure to radiation increased the risk of developing a particular disease.  Which measure of disease frequency should be used?

• Cumulative incidence (CI)

• Incidence density (ID)

• Estimated incidence rate (EIR)

• Risk ratio (RR)

• Odds ratio (OR)