retrospective cohort study
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- A 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 smoke and those who do not smoke) are compared for a particular outcome (such as lung cancer). Also called historic cohort study.
National Cancer Institute - Cite This Source - This Definition - cohort study, historic cohort study, observational study, outcome, prospective cohort study