What is a case in a case control study?
Category:
medical health
cancer
A case-control study is designed to help determine if an exposure is associated with an outcome (i.e., disease or condition of interest). First, identify the cases (a group known to have the outcome) and the controls (a group known to be free of the outcome).
Correspondingly, what is an example of a case control study?
A case-control study is a retrospective study that looks back in time to find the relative risk between a specific exposure (e.g. second hand tobacco smoke) and an outcome (e.g. cancer). A control group of people who do not have the disease or who did not experience the event is used for comparison.
Similarly, what does case control study mean?
A study that compares patients who have a disease or outcome of interest (cases) with patients who do not have the disease or outcome (controls), and looks back retrospectively to compare how frequently the exposure to a risk factor is present in each group to determine the relationship between the risk factor and the
The main limitations of case-control studies are:
- 'Recall bias' When people answer questions about their previous exposure to certain risk factors their ability to recall may be unreliable.
- Cause and effect.
- 'Sampling bias'
- Other limitations.