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  2. Cohort study - Wikipedia

    en.wikipedia.org/wiki/Cohort_study

    Cohort studies represent one of the fundamental designs of epidemiology which are used in research in the fields of medicine, pharmacy, nursing, psychology, social science, and in any field reliant on 'difficult to reach' answers that are based on evidence . In medicine for instance, while clinical trials are used primarily for assessing the ...

  3. 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 ...

  4. Prospective cohort study - Wikipedia

    en.wikipedia.org/wiki/Prospective_cohort_study

    Case–control study versus cohort on a timeline. "OR" stands for "odds ratio" and "RR" stands for "relative risk". 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 ...

  5. Research design - Wikipedia

    en.wikipedia.org/wiki/Research_design

    A research design typically outlines the theories and models underlying a project; the research question(s) of a project; a strategy for gathering data and information; and a strategy for producing answers from the data. [1] A strong research design yields valid answers to research questions while weak designs yield unreliable, imprecise or ...

  6. Longitudinal study - Wikipedia

    en.wikipedia.org/wiki/Longitudinal_study

    Growing Up in Ireland is an Irish Government-funded study of children being carried out jointly by the Economic and Social Research Institute and Trinity College Dublin. The study started in 2006 and follows the progress of two groups of children: 8,000 9-year-olds (Child Cohort/Cohort '98) and 10,000 9-month-olds (Infant Cohort/Cohort '08).

  7. 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).

  8. Nested case–control study - Wikipedia

    en.wikipedia.org/wiki/Nested_case–control_study

    A case–cohort study is a design in which cases and controls are drawn from within a prospective study. All cases who developed the outcome of interest during the follow-up are selected and compared with a random sample of the cohort. This randomly selected control sample could, by chance, include some cases.

  9. Rotterdam Study - Wikipedia

    en.wikipedia.org/wiki/Rotterdam_Study

    The participants of this second cohort visited the research center for a follow-up examinations in 2004-2005, 2011–2012, and 2015-2016. The third cohort of the Rotterdam Study (RS-III) started in 2006, this time with inhabitants aged 45 years and over. Inclusion ended in December 2008 and 3,932 participants have been included in this third ...