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Case–control studies 

Case–control studies
Case–control studies

Noel S. Weiss

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date: 27 January 2022

Case-control studies compare ill or injured individuals (cases) with those at risk of the illness or injury (controls) with regard to prior exposures or characteristics. If a case-control study is able to enrol cases and controls from the same underlying population at risk of the outcome, and can measure the exposure status of these persons in a valid manner, the results obtained will closely resemble those of a properly done cohort study.

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