Cohort Medical AI / Study Design
noun
Definition: In research design, a cohort is a defined group of individuals who share a characteristic, exposure, or starting condition and are followed over time to assess subsequent outcomes. Cohort studies are longitudinal and may be prospective, retrospective, or ambispective, with the aim of examining associations between exposures or risk factors and later status or disease outcomes [Andrade 2022].
Example in context: “This retrospective cohort study aimed to develop a transparent and clinically grounded machine learning framework for predicting 30-day in-hospital mortality …” [Chen et al. 2025]
Synonyms: study cohort; participant cohort; longitudinal cohort
Related terms: cohort study; prospective cohort; retrospective cohort; exposure; risk factor; outcome; longitudinal study