For Case-control Study we have terms and definitions in 4 topics. The topics are Autism, Cancer, Chronic Fatigue Syndrome and Toxic Substances.

Case-control Study (Autism)

A study in which two groups, one having the condition of interest and the other without it, are compared. The study looks backwards in time to see the rate at which the groups have been exposed to the factor believed to be associated with the condition in question.

Case-control Study (Cancer)

A study that compares two groups of people: those with the disease or condition under study (cases) and a very similar group of people who do not have the disease or condition (controls). Researchers study the medical and lifestyle histories of the people in each group to learn what factors may be associated with the disease or condition. Also called a retrospective study.

Case-control Study (Chronic Fatigue Syndrome)

An epidemiologic study that examines selected patients who have a defined disease (cases) with persons without the disease (controls).

Case-control Study (Toxic Substances)

A study that compares exposures of people who have a disease or condition (cases) with people who do not have the disease or condition (controls). Exposures that are more common among the cases may be considered as possible risk factors for the disease.

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