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 [..]

A type of epidemiological study that compares subjects who have a disease or condition (the cases) with similar subjects who do not have the disease or condition (the controls). In a case-control study the medical and lifestyle histories of the subjects in each group are investigated to learn what factors may be associated with the disease or condi [..]

A study designed to determine the association between an exposure and outcome in which patients are sampled by outcome. Those with the outcome (cases) are compared to those without the outcome (controls) with respect to exposure to the suspected harmful agent.

A retrospective, observational study comparing a group of people with a disorder (cases) and a group of people free of the disorder (controls) to determine whether differences in the groups' prev [..]

An epidemiological method that involves pairing observations of diseased or affected individuals, cases, with matched controls that are as much like the cases but without the disease. © Nature [..]

A form of association study in which “case” individuals with, for example, a disease are compared with “control” individuals without it.

The observational epidemiologic study of persons with the disease (or other outcome variable) of interest and a suitable control (comparison, reference) group of persons without the disease. The relationship of an attribute to the disease is examined by comparing the diseased and nondiseased with regard to how frequently the attribute is present or [..]

A case-control study is an epidemiological study

In cancer research, a study that compares a group of people with cancer to a similar group without cancer. Also called a retrospective study.

A research study that compares one group of people with a particular disease to a very similar group that does not have the same disease.

A study which involves identifying patients who have the outcome of interest (cases) and patients without the same outcome (controls), and looking back to see if they had the exposure of interest.

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 [..]

a study in which exposures of people who have been diagnosed with a disease (cases) are compared to those of people without the disease (controls). The results of case-control studies are more likely [..]

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. For examp [..]

A study that starts with identification of people with the disease, disorder or condition of interest (the cases) and a suitable control group without the disease or outcome (the controls). The relationship of an attribute (medicine, treatment, exposure or risk factor) to the outcome of interest is examined by comparing the frequency or level of th [..]

A study in which the risk factors of people with a disease are compared with those without a disease.

A systematic comparison of troublesome persons, places, times, or events to untroublesome ones to find out the characteristics that might cause the problem. This type of study is particularly useful when troublesome cases are a very small proportion of all cases.

A type of observational analytic study. Enrollment into the study is based on presence (``case'') or absence (``control'') of disease. Characteristics such as previous exposure are [..]

Retrospective comparison of exposures of persons with disease with those of persons without the disease (See Retrospective study).

is one of the three basic analytical observational study designs. A case-control study starts by defining groups according to the outcome (e.g. disease present or absent) and then looks back to establish the study factor (e.g. exposure present or absent). A case-control study has a backward directionality. A case-control study is unable to estimate [..]

Study groups are defined on the basis of disease (or outcome) status. The frequency of the risk factor (exposure) in the cases (diseased) is compared with the frequency of the risk factor (exposure) i [..]

typically examines multiple exposures in relation to a disease; subjects are defined as cases and controls, and exposure histories are compared (Aschengrau & Seage, 2007, p. 137).

A study that compares people with a specific disease or outcome of interest (cases) to people from the same population without that disease or outcome (controls), and which seeks to find associations [..]