Retrospective studies are observational studies by necessity because they assess past events and it is impossible to perform a randomized, controlled experiment with them. However, they …

In a retrospective study, in contrast to a prospective study, the outcome of interest has already occurred at the time the study is initiated. There are two types of retrospective study: a …

A retrospective cohort study, also called a historic cohort study, is a longitudinal cohort study used in medical and psychological research.

Jul 31, 2023 · A retrospective study, sometimes called a historical cohort study, is a type of longitudinal study in which researchers look back to a certain point to analyze a particular …

A retrospective study (by definition non-interventional) is a purely observational review and/or reassessment of database records with the aim of analyzing previous events of interest.

Jul 2, 2025 · Unlike prospective studies, which track subjects forward in time, retrospective studies look backward to identify potential correlations between past events or exposures and …

Feb 10, 2023 · A retrospective cohort study is a type of observational study focused on individuals who have an exposure to a disease or risk factor in common.

Jun 5, 2025 · Unlike prospective cohort studies where participants are followed forward in time, retrospective studies analyze data that have already been collected for reasons other than the …

May 18, 2025 · A retrospective study is an observational study that looks backwards in time, often using existing records or data, to investigate exposures to suspected risk factors or …

What is a Retrospective Study? A retrospective study is a research design that examines data from past events to identify patterns, correlations, or outcomes. This type of study is often …