Retrospective study
Revision as of 13:21, 17 November 2023 by Editor iHTS (talk | contribs) (Created page with "A study in which the investigators do ex-post analysis of the outcomes in a group of subjects selected on the basis of their exposure to a given intervention or factor. '''Note:''' This type of study is more subject to bias than are prospective studies. Case-control studies are always retrospective, cohort studies sometimes are, and randomized controlled trials never are. '''Ant.:''' prospective study. == Reference == http://htaglossary.net/...")
A study in which the investigators do ex-post analysis of the outcomes in a group of subjects selected on the basis of their exposure to a given intervention or factor.
Note: This type of study is more subject to bias than are prospective studies. Case-control studies are always retrospective, cohort studies sometimes are, and randomized controlled trials never are.
Ant.: prospective study.