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See the Directory of published versions Value Set

Clinical Decision Support Work Group Maturity Level: 0Trial Use Use Context: Not yet ready for Production use

This is a value set defined by the FHIR project.


Defining URL:

Commonly used classifiers for evidence sets.

Committee:Clinical Decision Support Work Group
OID:2.16.840.1.113883.4.642.3.0 (for OID based terminology systems)
Source ResourceXML / JSON

This value set is used in the following places:


This expansion generated 23 May 2022

This value set contains 31 concepts

Expansion based on EvidenceClassifier v4.6.0 (CodeSystem)

All codes in this table are from the system

COVID19SpecificCOVID-19 specific articleAbout COVID-19.
COVID19RelevantCOVID-19 relevant (but not specific) articleNot about COVID-19 but relevant to COVID-19 management or understanding.
COVID19HumanResearchCOVID-19 human data in population, exposure, or outcomecontains human COVID-19 disease in the research data as any variable (population, exposure or outcome).
OriginalResearchArticle includes original researchsuch as randomized trial, observational study.
ResearchSynthesisArticle includes synthesis of researchsuch as systematic review, meta-analysis, rapid review.
GuidelineArticle includes guidelinefor clinical practice guidelines.
ResearchProtocolArticle provides protocol without resultsfor research protocols.
NotResearchNotGuidelineArticle is neither research nor guidelinefor things that are not research reports, research protocols or guidelines.
TreatmentArticle about treatmentabout therapeutic interventions.
PreventionAndControlArticle about prevention and controlabout preventive care and interventions.
DiagnosisArticle about diagnosisabout methods to distinguish having or not having a condition.
PrognosisPredictionArticle about prognosis or predictionabout predicting risk for something or risk factors for it.
RatedAsYesRated as yes, affirmative, positive, present, or include
RatedAsNoRated as no, negative, absent, or excludeRated as no, negative, absent, or exclude.
NotAssessedNot rated, not assessedNeither rated as yes nor rated as no.
RatedAsRCTclassified as randomized controlled trialclassified as randomized controlled trial.
RatedAsControlledTrialclassified as nonrandomized controlled trial (experimental)classified as nonrandomized controlled trial (experimental).
RatedAsComparativeCohortclassified as comparative cohort study (observational)classified as comparative cohort study (observational).
RatedAsCaseControlclassified as case-control studyclassified as case-control study.
RatedAsUncontrolledSeriesclassified as uncontrolled cohort (case series)classified as uncontrolled cohort (case series).
RatedAsMixedMethodsclassified as mixed-methods studyclassified as mixed-methods study.
RatedAsOtherclassified as other concept (not elsewhere classified)classified as other concept (not elsewhere classified).
RiskOfBiasRisk of bias assessmentRisk of bias assessment.
NoBlindingNo blindingNo blinding.
AllocConcealNotStatedAllocation concealment not statedAllocation concealment not stated.
EarlyTrialTerminationEarly trial terminationEarly trial termination.
NoITTNo intention-to-treat analysisNo intention-to-treat analysis.
PreprintPreprint (not final publication)Results presented in preprint (pre-final publication) form.
PreliminaryAnalysisPreliminary analysisPreliminary analysis.
BaselineImbalanceBaseline imbalancesDifferences between groups at start of trial may confound or bias the findings.
SubgroupAnalysisSubgroup analysisSubgroup analysis.


See the full registry of value sets defined as part of FHIR.

Explanation of the columns that may appear on this page:

LvlA few code lists that FHIR defines are hierarchical - each code is assigned a level. For value sets, levels are mostly used to organize codes for user convenience, but may follow code system hierarchy - see Code System for further information
SourceThe source of the definition of the code (when the value set draws in codes defined elsewhere)
CodeThe code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract')
DisplayThe display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application
DefinitionAn explanation of the meaning of the concept
CommentsAdditional notes about how to use the code