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Cohort Study is an observational study in which a group of individuals â a cohort â are followed over a period of time in order to determine either the incidence rate of certain diseases or the risk factors that lead to those diseases. These studies can be either prospective or retrospective.
Cohort studies â¢ Follow a group of individuals over time to assess the incidence of a disease (or some other outcome) â¢ Used to describe the effect of exposure to one or more factors of interest (potential âriskâ factors) on the incidence of the outcome â¢ Can be prospective or retrospective/historical.