What is a case in a case control study?
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.
Also Know, what is a case control and cohort study? Introduction. Case-control and cohort studies are observational studies that lie near the middle of the hierarchy of evidence. These types of studies, along with randomised controlled trials, constitute analytical studies, whereas case reports and case series define descriptive studies (1).
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
What are the limitations of a case control study?
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.