What is correctly termed prospective and retrospective is the direction of the examination: cohort studies are prospective, you find exposed or not exposed people, follow them up in the future, and then measure some outcome criteria; case control studies are retrospective, you find the sick and non sick, look back in their past, and then measure exposure or non exposure to a drug. All administrative claims data are retrolective. Pierre Biron. Retired clinical pharmacologist. New member.
White Paper: Retrospective Benefit-Cost Analysis
Odds Ratio and Attributable Risk (Retrospective) - StatsDirect
Cross Validated is a question and answer site for people interested in statistics, machine learning, data analysis, data mining, and data visualization. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. I've really tried to understand why you can't use RR in retrospective studies but for some reason I can't understand it. Has anyone been able to convey this simply to their students? I have been able to explain the need for the use of the odds ratio cross-product ratio to estimate effect size in a case-control study to students with a simplified example of two hypothetical studies of the same hypothetical people—one a cohort study and the other a case-control study. The hypothetical people are , adults.
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Case Study Shows Potential Protective Effect of TKI Therapy for Chronic Myeloid Leukemia
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Oops, you're using an old version of your browser so some of the features on this page may not be displaying properly. In particular, they analyzed the risk factors associated with admission to an intensive care unit, the use of mechanical ventilation or death. Their series was associated with poor outcomes.