Union of http://terminology.hl7.org/CodeSystem/variable-role-subtype and http://terminology.hl7.org/CodeSystem/variable-role-subtype

This is the CodeSystem that contains all the codes in EvidenceVariableRoleSubtype (http://terminology.hl7.org/CodeSystem/variable-role-subtype) and EvidenceVariableRoleSubtype (http://terminology.hl7.org/CodeSystem/variable-role-subtype). E.g. what you have to deal with if you get resources containing codes in either of them

CodeSystem

Generated Narrative: CodeSystem ca90e020-d879-4f3a-a3ce-376166f99d8f-2678

This code system http://hl7.org/fhir/comparison/CodeSystem/ca90e020-d879-4f3a-a3ce-376166f99d8f-2678 defines codes, but no codes are represented here

CodeDisplayDefinition
population populationvariable represents a population.
subpopulation subpopulationvariable represents a subpopulation.
exposure exposurevariable represents an exposure.
referenceExposure reference exposurevariable represents a reference exposure.
measuredVariable measured variablevariable represents a measured variable.
confounder confoundervariable represents a confounder.
measuredVariableA measured variable Avariable 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 Bvariable 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 Bvariable represents a result of a mathematical operation of two measured variables.