Cohort studies observe large groups of individuals and record their exposure to certain risk factors to find clues as to the possible causes of disease.
They can be prospective studies that gather data going forward, or retrospective cohort studies, which look at data already collected. This type of research can also help identify social factors that influence health.
This type of study design where one or more people (known as cohorts) are followed and subsequent status evaluations with respect to a disease or outcome are conducted to determine which participants exposure characteristics (risk factors) are associated. As the study is conducted, outcome from participants in each cohort is measured and relationships with specific characteristics determined.
Fundamentals of a cohort study:
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