Release 5 Preview #2 Code System

Clinical Decision Support Work Group Maturity Level: 0Trial Use Use Context: Any

This is a code system defined by the FHIR project.


Defining URL:

Commonly used classifiers for evidence sets.

Committee:Clinical Decision Support Work Group
OID:2.16.840.1.113883.4.642.1.0 (for OID based terminology systems)
Source ResourceXML / JSON

This Code system is used in the following value sets:

This code system defines the following codes:

COVID19Specific COVID-19 specific articleAbout COVID-19.
COVID19Relevant COVID-19 relevant (but not specific) articleNot about COVID-19 but relevant to COVID-19 management or understanding.
COVID19HumanResearch COVID-19 human data in population, exposure, or outcomecontains human COVID-19 disease in the research data as any variable (population, exposure or outcome).
OriginalResearch Article includes original researchsuch as randomized trial, observational study.
ResearchSynthesis Article includes synthesis of researchsuch as systematic review, meta-analysis, rapid review.
Guideline Article includes guidelinefor clinical practice guidelines.
ResearchProtocol Article provides protocol without resultsfor research protocols.
NotResearchNotGuideline Article is neither research nor guidelinefor things that are not research reports, research protocols or guidelines.
Treatment Article about treatmentabout therapeutic interventions.
PreventionAndControl Article about prevention and controlabout preventive care and interventions.
Diagnosis Article about diagnosisabout methods to distinguish having or not having a condition.
PrognosisPrediction Article about prognosis or predictionabout predicting risk for something or risk factors for it.
RatedAsYes Rated as yes, affirmative, positive, present, or include
RatedAsNo Rated as no, negative, absent, or excludeRated as no, negative, absent, or exclude.
NotAssessed Not rated, not assessedNeither rated as yes nor rated as no.
RatedAsRCT classified as randomized controlled trialclassified as randomized controlled trial.
RatedAsControlledTrial classified as nonrandomized controlled trial (experimental)classified as nonrandomized controlled trial (experimental).
RatedAsComparativeCohort classified as comparative cohort study (observational)classified as comparative cohort study (observational).
RatedAsCaseControl classified as case-control studyclassified as case-control study.
RatedAsUncontrolledSeries classified as uncontrolled cohort (case series)classified as uncontrolled cohort (case series).
RatedAsMixedMethods classified as mixed-methods studyclassified as mixed-methods study.
RatedAsOther classified as other concept (not elsewhere classified)classified as other concept (not elsewhere classified).
RiskOfBias Risk of bias assessmentRisk of bias assessment.
NoBlinding No blindingNo blinding.
AllocConcealNotStated Allocation concealment not statedAllocation concealment not stated.
EarlyTrialTermination Early trial terminationEarly trial termination.
NoITT No intention-to-treat analysisNo intention-to-treat analysis.
Preprint Preprint (not final publication)Results presented in preprint (pre-final publication) form.
PreliminaryAnalysis Preliminary analysisPreliminary analysis.
BaselineImbalance Baseline imbalancesDifferences between groups at start of trial may confound or bias the findings.
SubgroupAnalysis Subgroup analysisSubgroup analysis.


See the full registry of code systems defined as part of FHIR.

Explanation of the columns that may appear on this page:

LevelA few code lists that FHIR defines are hierarchical - each code is assigned a level. 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