Prospective Cohort Study

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A Prospective Cohort Study is a longitudinal cohort study that follows a study cohort (where cohort assignment precedes outcome evaluation).



References

2022

  • (Wikipedia, 2022) ⇒ https://en.wikipedia.org/wiki/Prospective_cohort_study Retrieved:2022-1-8.
    • A prospective cohort study is a longitudinal cohort study that follows over time a group of similar individuals (cohorts) who differ with respect to certain factors under study, to determine how these factors affect rates of a certain outcome.[1] 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 nonsmokers.

      The prospective study is important for research on the etiology of diseases and disorders. The distinguishing feature of a prospective cohort study is that at the time that the investigators begin enrolling subjects and collecting baseline exposure information, none of the subjects have developed any of the outcomes of interest. After baseline information is collected, subjects in a prospective cohort study are then followed "longitudinally," i.e. over a period of time, usually for years, to determine if and when they become diseased and whether their exposure status changes outcomes. In this way, investigators can eventually use the data to answer many questions about the associations between "risk factors" and disease outcomes. For example, one could identify smokers and non-smokers at baseline and compare their subsequent incidence of developing heart disease. Alternatively, one could group subjects based on their body mass index (BMI) and compare their risk of developing heart disease or cancer. Prospective cohort studies are typically ranked higher in the hierarchy of evidence than retrospective cohort studies [2] and can be more expensive than a case–control study. One of the advantages of prospective cohort studies is they can help determine risk factors for being infected with a new disease because they are a longitudinal observation over time, and the collection of results is at regular time intervals, so recall error is minimized.

  1. Cite error: Invalid <ref> tag; no text was provided for refs named urlDefinition of prospective cohort study - NCI Dictionary of Cancer Terms
  2. .http://content.karger.com/ProdukteDB/produkte.asp?Aktion=ShowFulltext&ArtikelNr=235241&ProduktNr=228539

2018

2014

2010a

  • (AMTA, 2010) ⇒ American Massage Theory Association. (2010). “Glossary of Research Terminology."
    • QUOTE: Prospective Cohort Design: One of three possible designs considered to be ex post facto (or after the fact) designs. In this design the two or more comparative groups are formed in the present based on an already existing exposure to treatment/condition variations and then followed forward into the future with a view toward one or more outcomes being measured.

2010b

2009