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  2. Cohort study - Wikipedia

    en.wikipedia.org/wiki/Cohort_study

    An example of an epidemiological question that can be answered using a cohort study is whether exposure to X (say, smoking) associates with outcome Y (say, lung cancer). For example, in 1951, the British Doctors Study was started. Using a cohort which included both smokers (the exposed group) and non-smokers (the unexposed group).

  3. Cohort (statistics) - Wikipedia

    en.wikipedia.org/wiki/Cohort_(statistics)

    Case–control study versus cohort on a timeline. "OR" stands for "odds ratio" and "RR" stands for "relative risk".In statistics, epidemiology, marketing and demography, a cohort is a group of subjects who share a defining characteristic (typically subjects who experienced a common event in a selected time period, such as birth or graduation).

  4. Cohort analysis - Wikipedia

    en.wikipedia.org/wiki/Cohort_analysis

    An example of cohort analysis of gamers on a certain platform: Expert gamers, cohort 1, will care more about advanced features and lag time compared to new sign-ups, cohort 2. With these two cohorts determined, and the analysis run, the gaming company would be presented with a visual representation of the data specific to the two cohorts.

  5. Longitudinal study - Wikipedia

    en.wikipedia.org/wiki/Longitudinal_study

    Cohort studies are one type of longitudinal study which sample a cohort (a group of people who share a defining characteristic, typically who experienced a common event in a selected period, such as birth or graduation) and perform cross-section observations at intervals through time. Not all longitudinal studies are cohort studies; some ...

  6. Retrospective cohort study - Wikipedia

    en.wikipedia.org/wiki/Retrospective_cohort_study

    A retrospective cohort study, also called a historic cohort study, is a longitudinal cohort study used in medical and psychological research. A cohort of individuals that share a common exposure factor is compared with another group of equivalent individuals not exposed to that factor, to determine the factor's influence on the incidence of a ...

  7. Prospective cohort study - Wikipedia

    en.wikipedia.org/wiki/Prospective_cohort_study

    For example, one might follow a cohort of middle-aged truck drivers who vary in terms of smoking habits to test the hypothesis that the 20-year incidence rate of lung cancer will be highest among heavy smokers, followed by moderate smokers, and then non–smokers.

  8. Cohort effect - Wikipedia

    en.wikipedia.org/wiki/Cohort_effect

    The term cohort effect is used in social science to describe variations in the characteristics of an area of study (such as the incidence of a characteristic or the age at onset) over time among individuals who are defined by some shared temporal experience or common life experience, such as year of birth, or year of exposure to radiation.

  9. Cohort - Wikipedia

    en.wikipedia.org/wiki/Cohort

    Cohort (statistics), a group of subjects with a common defining characteristic, for example age group; Cohort (floating point), a set of different encodings of the same numerical value; Cohort (taxonomy), in biology, one of the taxonomic ranks; Cohort study, a form of longitudinal study used in medicine and social science