case-cohort study


case-cohort study
an epidemiologic study in which samples of cases and surviving noncases of the condition being studied are drawn from the same cohort of a cohort study. The cases and noncases are matched for duration of survival and their histories are compared.

Medical dictionary. 2011.

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  • case control study — comparison of a group of people who have a disease with another group free from that disease, in terms of variable in their backgrounds (e.g. cigarette smoking in those who have died from lung cancer and in those dying from other causes). In the… …   Medical dictionary

  • case control study — comparison of a group of people with a disease or condition and a control group of people free from that disease (e.g. people diagnosed with lung cancer and people without lung cancer). The groups are compared in terms of the frequency of… …   The new mediacal dictionary

  • Cohort study — For other senses of this word, see cohort (disambiguation). A cohort study or panel study is a form of longitudinal study (a type of observational study) used in medicine, social science, actuarial science, and ecology. It is an analysis of risk… …   Wikipedia

  • Retrospective cohort study — A retrospective cohort study, also called a historic cohort study, is a medical research study in which the medical records of groups of individuals who are alike in many ways but differ by a certain characteristic (for example, female nurses who …   Wikipedia

  • Prospective cohort study — A prospective cohort study is a research study that follows over time groups of individuals who are similar in some respects (e.g., all are working adults) but differ on certain other characteristics (e.g., some smoke and others do not) and… …   Wikipedia

  • Nested case-control study — A nested case control study is a variation of a case cohort study in which only a subset of controls from the cohort are compared to the incident cases. In a case cohort study, all incident cases in the cohort are compared to a random subset of… …   Wikipedia

  • nested case-control study — a case control study nested within a cohort study: a population is identified and baseline data obtained and stored; after following the cohort for some time, a case control study is performed using the small percentage of people who develop the… …   Medical dictionary

  • Study design — A study design is an analytic approach to conduct an epidemiological investigation, such as a clinical trial. Types of designSome of the most popular designs are sorted below, with the ones at the top being the most powerful at reducing observer… …   Wikipedia

  • Case-control — is a type of epidemiological study design. Case control studies are used to identify factors that may contribute to a medical condition by comparing subjects who have that condition (the cases ) with patients who do not have the condition but are …   Wikipedia

  • Case study — This article is about the method of doing research. For the teaching method, see Case method. For the method of teaching law, see Casebook method. A case study is an intensive analysis of an individual unit (e.g., a person, group, or event)… …   Wikipedia