Lorraine K . Alexander , DrPH
نویسنده
چکیده
Case-control studies are used to determine if there is an association between an exposure and a specific health outcome. These studies proceed from effect (e.g. health outcome, condition, disease) to cause (exposure). Case-control studies assess whether exposure is disproportionately distributed between the cases and controls, which may indicate that the exposure is a risk factor for the health outcome under study. Casecontrol studies are frequently used for studying rare health outcomes or diseases.
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