Explore: Retrospective Studies

or death. Retrospective cohort studies have existed for approximately as long as prospective cohort studies. The retrospective cohort study compares groups

confounding in retrospective studies. Case–control studies are a relatively inexpensive and frequently used type of epidemiological study that can be carried

I randomized, controlled trials exist on the subject. Numerous retrospective studies, however, have suggested strongly that the addition of postoperative

A retrospective (from Latin retrospectare, "look back"), generally, is a look back at events that took place, or works that were produced, in the past

for the demographer to have all the necessary data. Retrospective Cohort Study: Retrospective Studies start with subjects that are at risk to have the outcome

cohort studies are of substantially superior quality to those obtained from retrospective/cross-sectional studies. Prospective cohort studies are considered

untreated syphilis in several hundred white males. This study was a retrospective study since investigators pieced together information from the histories

effective interventions designed to alleviate AMA discharges. Multiple retrospective studies examining AMA discharges over the last 4 decades have attempted

avoided because other research designs besides case-control studies are also retrospective in orientation.[citation needed] Superiority trials are designed

the world), and has been described as a separate species in 1995. Retrospective studies have shown that previously it had been commonly identified as Candida