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Questions and Answers
What is a case series?
What is a case series?
- A series of reports about the same phenomenon, usually published after the first report (correct)
- A study in which data on both exposure and outcome are determined at the same time
- A study that calculates exposure rates in each group
- A study that finds an association between exposure and outcome
What is the ideal order of events in a cross-sectional study?
What is the ideal order of events in a cross-sectional study?
- Outcome followed by exposure
- Exposure followed by outcome (correct)
- Outcome and exposure at the same time
- Exposure and outcome alternating
What is an example of a cross-sectional study?
What is an example of a cross-sectional study?
- A study of the effects of air pollution on asthma
- A study of the association between uric acid levels and hypertension (correct)
- A study of the effects of diet on cholesterol levels
- A study of the association between smoking and lung cancer
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Study Notes
- A case series is a series of reports about the same phenomenon, usually published after the first report about a particular phenomenon has been published.
- A cross-sectional study is a study in which data on both exposure and outcome are determined at the same time.
- Exposure rates are calculated in each group, and then these rates are compared.
- Ideally, exposure should always precede outcome in studies like these.
- For example, if the researcher is studying the association between uric acid levels and hypertension, and on analysis finds that higher uric acid levels are associated with higher blood pressure levels, this would be a result of a study that is a cross-sectional study.
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