HL7 Terminology (THO)
7.0.0 - publication International flag

This page is part of the HL7 Terminology (v7.0.0: Release) based on FHIR (HL7® FHIR® Standard) v5.0.0. This is the current published version. For a full list of available versions, see the Directory of published versions

CodeSystem: EvidenceVariableRole

Official URL: http://terminology.hl7.org/CodeSystem/variable-role Version: 2.0.1
Active as of 2025-10-25 Maturity Level: 0 Responsible: Health Level Seven International Computable Name: EvidenceVariableRole
Other Identifiers: OID:2.16.840.1.113883.4.642.1.1457

Copyright/Legal: This material derives from the HL7 Terminology (THO). THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license.html

Deprecation Information: This CodeSystem/ValueSet was used in FHIR R5 for a CodeableConcept binding that was changed to a code binding in FHIR R6. The replacement CodeSystem/ValueSet is http://hl7.org/fhir/variable-role and http://hl7.org/fhir/ValueSet/variable-role.

This Code system is referenced in the content logical definition of the following value sets:

Last updated: 2024-04-24 00:00:00+0000

This case-sensitive code system http://terminology.hl7.org/CodeSystem/variable-role defines the following codes:

CodeDisplayDefinition
population population variable represents a population.
subpopulation subpopulation variable represents a subpopulation.
exposure exposure variable represents an exposure.
referenceExposure reference exposure variable represents a reference exposure.
measuredVariable measured variable variable represents a measured variable.
confounder confounder variable represents a confounder.
measuredVariableA measured variable A variable represents a first of two measured variables to be used in a measured variable that is a mathematical operation of two measured variables.
measuredVariableB measured variable B variable represents a second of two measured variables to be used in a measured variable that is a mathematical operation of two measured variables.
measuredVariableAB measured variable A to B variable represents a result of a mathematical operation of two measured variables.

History

DateActionAuthorCustodianComment
2025-11-13reviseKhalid ShahinCDSRetire of EvidenceVariableRole ValueSet and CodeSystem from THO; up-675
2024-06-19reviseBrian S. AlperCDSAdd 3 terms to http://terminology.hl7.org/CodeSystem/variable-role; up-427
2023-11-14reviseMarc DuteauTSMGAdd standard copyright and contact to internal content; up-476
2020-10-14reviseGrahame GrieveVocabulary WGReset Version after migration to UTG
2020-05-06reviseTed KleinVocabulary WGMigrated to the UTG maintenance environment and publishing tooling.