The **measures of association** refer to a wide variety of coefficients that **measure** the statistical strength of the relationship on the variables of interest; these **measures** of strength, or **association**, can be described in several ways, depending on the analysis.

Considering this, what does a case control study measure?

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

Can you calculate relative risk in a case control study?

Key Concept: In a **study** that is designed and conducted as a **case**-**control study**, **you** cannot **calculate** incidence. Therefore, **you** cannot **calculate risk** ratio or **risk** difference. **You can** only **calculate** an odds ratio. However, in certain situations a **case**-**control study** is the only feasible **study** design.

What is odds ratio in case control study?

The **odds ratio** is the measure of association for a **case**-**control study**. It tells us how much higher the **odds** of exposure is among **cases** of a disease compared with **controls**. The **odds ratio** compares the **odds** of exposure to the factor of interest among **cases** to the **odds** of exposure to the factor among **controls**.

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