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Origin ID
QR322
Preferred Label
cohort study
étude de cohorteCategory label
Cohort studyEtude de cohorteétude de cohorte observationnelleQ-Code supplementary keywords
Observational cohort studyProspective cohort studiesenquête prospectiveQ-Code scope note
studies in which subsets of a defined population are identified. These groups may or may not be exposed to factors hypothesized to influence the probability of the occurrence of a particular disease or other outcome. Cohorts are defined populations which, as a whole, are followed in an attempt to determine distinguishing subgroup characteristics (MeSH)études dans lesquelles on identifie des sous-ensembles d'une population définie. Ces groupes peuvent ou ne peuvent pas être exposées à des facteurs influençant hypothetiquement la probabilité d'apparition d'une maladie particulière ou d'un autre résultat.Les cohortes sont des populations qui sont suivies comme un tout dans une tentative pour déterminer des caractéristiques de sous-groupes distinctifs (MeSH)Q-Code conceptual content
birth cohort ; The location of a person in historical time as indexed by his or her year of birth. Birth cohorts are often differentially affected by social events. Numerous cohort variations in factors that have long-term effects on health (e.g., childbearing, smoking, physical activity) have been documented. Cohort effects are easiest to distinguish when disease trends have accelerated, decelerated, or changed direction; where they are steady and linear, they can hardly be distinguished reliably from period effects (Dicepid)cohort ; (From Latin cohors, warriors, the tenth part of a legion) 1. The component of the population born during a particular period and identified by period of birth so that its characteristics (e.g., causes of death and numbers still living) can be ascertained as it enters successive time and age periods. 2. The term “cohort” has broadened to describe any designated group of persons who are followed or traced over a period of time, as in cohort study (prospective study)(Dicepid)Cohort Effect ;Variation in health status arising from different causal factors to which each birth cohort in a population is exposed as environment and society change (MeSH)Cohort Studies ; Studies in which subsets of a defined population are identified. These groups may or may not be exposed to factors hypothesized to influence the probability of the occurrence of a particular disease or other outcome. Cohorts are defined populations which, as a whole, are followed in an attempt to determine distinguishing subgroup characteristics (MeSH)Lost to Follow-Up ; Study subjects in COHORT STUDIES whose outcomes are unknown e.g., because they could not or did not wish to attend follow-up visits.(from Dictionary of Epidemiology, 5th ed.)(MeSH)Prospective cohort studies ; re-investigate groups of people who share some social characteristic. Cohort study design in health research started with two matched groups of people. After initial assessment, the experimental group received a measurable treatment: their medical outcomes were followed through repeated tests, preferably until patients were healed. The other, ‘control’, group did not receive the treatment: any emerging differences could plausibly be attributed to the effects of the treatment (Payne 2008 Sage)UMLS CUI
C0009247
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Citation
Shorvon SD, Goodridge DM. Longitudinal cohort studies of the prognosis of epilepsy: contribution of the National General Practice Study of Epilepsy and other studies. Brain : a journal of neurology. 2013; 136(Pt 11): 3497-510. Available from: http://www.ncbi.nlm.nih.gov/pubmed/24067241
White ES, Pereira Gray D, Langley P, Evans PH. Fifty years of longitudinal continuity in general practice: a retrospective observational study. Family practice. 2016; 33(2): 148-53. Available from: http://www.ncbi.nlm.nih.gov/pubmed/26895634
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