Cohort Study

{
  "id": "MLC-T-ENV-005528",
  "term": "Cohort Study",
  "field": "Environment",
  "definition": "1. An epidemiologic study comparing those with an exposure of interest to those without the exposure. These two cohorts are then followed over time to determine the differences in the rates of disease between the exposure subjects.\n\n2. An observational analytic study in which enrollment is based on status of exposure to a certain factor or membership in a certain group. Populations are followed, and disease, death, or other health-related outcomes are documented and compared. Cohort studies can be either prospective or retrospective.\n\n3. An epidemiologic study comparing those with an exposure of interest to those without the exposure. These two cohorts are then followed over time to determine the differences in the rates of disease between the exposure subjects. [EPA 2003]\n\n4. A type of observational analytic study. Enrollment into the study is based on exposure characteristics or membership in a group. Disease, death, or other health-related outcomes are then ascertained and compared. [CDC 2005][\n\n5. A follow-up or longitudinal study that assesses exposure status before assessing outcome. [NZ 2002]\n\n6. An epidemiologic study that observes subjects in differently exposed groups and compares the incidence of symptoms. Although ordinarily prospective in nature, such a study is sometimes carried out retrospectively, using historical data. [RAIS 2004]",
  "subject": "Health and safety",
  "see_also": [
    "Prospective Study"
  ],
  "references": [
    "Integrated Risk Information System (IRIS) Glossary",
    "CDC Glossary of Epidemiology Terms",
    "Thesaurus of Terms Used in Microbial Risk Assessment"
  ],
  "url": "https://mlchart.com/terminology/environment/cohort-study/"
}