Cohort Study

A Cohort Study is a longitudinal study that separates cases into cohort groups.

• AKA: Concurrent Study, Follow-up Study, Incidence Study, Prospective Study.
• See: Cohort, Cohort Analysis, Controlled Experiment, Case Control Study.

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References

• http://en.wikipedia.org/wiki/Cohort_study

2007

• http://www.statistics.com/resources/glossary/c/cohortstudy.php
  • A cohort study is a longitudinal study that identifies a population or large group (a "cohort") then draws a sample from the population at various points in time and records data for the sample.

• http://www.statistics.com/resources/glossary/l/longstudy.php
  • Longitudinal study: Longitudinal studies are those that record data for subjects or variables over time. If a longitudinal study uses the same subjects at each point where data are recorded, it is a panel study . If a longitudinal study samples from the same group at each point where data are recorded, it is a cohort study . See also longitudinal data, cross sectional study .

• US National Institute of Health. "IUPAC Glossary of Terms Used in Toxicology."
  • cohort study / concurrent study / follow-up study / incidence study / longitudinal study / prospective study:
    • Analytic study of epidemiological study in which subsets of a defined population can be identified who are, have been, or in the future may be exposed or not exposed, or exposed in different degrees, to a factor or factors hypothesized to influence the probability of occurrence of a given disease or other outcome. The main feature of the method is observation of a large population for a prolonged period (years), with comparison of incidence rates of the given disease in groups that differ in exposure levels.
  • cohort: Component of the population born during a particular period and identified by period of birth so that its characteristics (such as causes of death and numbers still living) can be ascertained as it enters successive time and age periods. The term “cohort” has broadened to describe any designated group of persons followed or traced over a period of time, as in the term cohort study (prospective study).
  • cohort analysis: Tabulation and analysis of morbidity or mortality rates in relationship to the ages of a specific group of people (cohort), identified by their birth period, and followed as they pass through different ages during part or all of their life span. In certain circumstances such as studies of migrant populations, cohort analysis may be performed according to duration of residence in a country rather than year of birth, in order to relate health or mortality experience to duration of exposure.

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