Case-Control Study. Definition

Medical Definition: Case-Control Study

Study comparing two groups of people: those with the disease or condition under study (cases) and a very similar group of people who have the disease or condition (controls). Researchers study the medical history and lifestyle of people in each group to learn what factors may be related to the disease or condition. For example, one group may have been exposed to a particular substance to which the other was not exposed. Also called a retrospective study.

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