Case-Control Studies

**Definition:** Comparisons that start with the identification of persons with the disease or outcome of interest and a control (comparison, referent) group without the disease or outcome of interest. The relationship of an attribute is examined by comparing both groups with regard to the frequency or levels of outcome over time.

**Tree numbers:** - E05.318.372.500.500 - N05.715.360.330.500.500 - N06.850.520.450.500.500

**Synonyms:** - Case-Comparison Studies - Case-Compeer Studies - Case-Base Studies - Case-Referent Studies - Case-Referrent Studies - Case Control Studies