<?xml version="1.0" encoding="UTF-8"?><CodeSystem xmlns="http://hl7.org/fhir"><id value="variable-handling-example"/><meta><lastUpdated value="2026-03-31T18:55:04.283+00:00"/></meta><text><status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: CodeSystem variable-handling-example</b></p><a name="variable-handling-example"> </a><a name="hcvariable-handling-example"> </a><p>This case-sensitive code system <code>http://hl7.org/fhir/variable-handling-example</code> defines the following codes:</p><table class="codes"><tr><td style="white-space:nowrap"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style="white-space:nowrap">boolean<a name="variable-handling-example-boolean"> </a></td><td>boolean variable</td><td>A boolean variable is a variable which is defined to have only 2 possible values: True or False.</td></tr><tr><td style="white-space:nowrap">continuous<a name="variable-handling-example-continuous"> </a></td><td>continuous variable</td><td>A continuous variable is one for which, within the limits the variable ranges, any value is possible (from STATO http://purl.obolibrary.org/obo/STATO_0000251).</td></tr><tr><td style="white-space:nowrap">dichotomous<a name="variable-handling-example-dichotomous"> </a></td><td>dichotomous variable</td><td>A dichotomous variable is a categorical variable which is defined to have only 2 categories or possible values (from STATO http://purl.obolibrary.org/obo/STATO_0000090).</td></tr><tr><td style="white-space:nowrap">ordinal<a name="variable-handling-example-ordinal"> </a></td><td>ordinal variable</td><td>An ordinal variable is a categorical variable where the discrete possible values are ordered or correspond to an implicit ranking (from STATO http://purl.obolibrary.org/obo/STATO_0000228).</td></tr><tr><td style="white-space:nowrap">polychotomous<a name="variable-handling-example-polychotomous"> </a></td><td>polychotomous variable</td><td>A polychotomous variable is a categorical variable which is defined to have minimally 2 categories or possible values. (from STATO  http://purl.obolibrary.org/obo/STATO_0000087).  Suggestion to limit code use to situations when neither dichotomous nor ordinal variables apply.</td></tr><tr><td style="white-space:nowrap">time-to-event<a name="variable-handling-example-time-to-event"> </a></td><td>time-to-event</td><td>time-to-event</td></tr><tr><td style="white-space:nowrap">not-specified<a name="variable-handling-example-not-specified"> </a></td><td>not-specified</td><td>not-specified</td></tr></table></div></text><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg"><valueCode value="cds"/></extension><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status"><valueCode value="normative"/></extension><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm"><valueInteger value="5"/></extension><url value="http://hl7.org/fhir/variable-handling-example"/><version value="6.0.0-ballot4"/><name value="EvidenceVariableHandlingExample"/><title value="Evidence Variable Handling Example"/><status value="active"/><experimental value="false"/><date value="2021-01-05T10:01:24+11:00"/><publisher value="HL7 (FHIR Project)"/><contact><telecom><system value="url"/><value value="http://hl7.org/fhir"/></telecom><telecom><system value="email"/><value value="fhir@lists.hl7.org"/></telecom></contact><description value="The handling of the variable in statistical analysis for exposures or outcomes (E.g. Dichotomous, Continuous, Descriptive)."/><jurisdiction><coding><system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/><code value="001"/><display value="World"/></coding></jurisdiction><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/variable-handling-example"/><content value="complete"/><concept><code value="boolean"/><display value="boolean variable"/><definition value="A boolean variable is a variable which is defined to have only 2 possible values: True or False."/></concept><concept><code value="continuous"/><display value="continuous variable"/><definition value="A continuous variable is one for which, within the limits the variable ranges, any value is possible (from STATO http://purl.obolibrary.org/obo/STATO_0000251)."/></concept><concept><code value="dichotomous"/><display value="dichotomous variable"/><definition value="A dichotomous variable is a categorical variable which is defined to have only 2 categories or possible values (from STATO http://purl.obolibrary.org/obo/STATO_0000090)."/></concept><concept><code value="ordinal"/><display value="ordinal variable"/><definition value="An ordinal variable is a categorical variable where the discrete possible values are ordered or correspond to an implicit ranking (from STATO http://purl.obolibrary.org/obo/STATO_0000228)."/></concept><concept><code value="polychotomous"/><display value="polychotomous variable"/><definition value="A polychotomous variable is a categorical variable which is defined to have minimally 2 categories or possible values. (from STATO  http://purl.obolibrary.org/obo/STATO_0000087).  Suggestion to limit code use to situations when neither dichotomous nor ordinal variables apply."/></concept><concept><code value="time-to-event"/><display value="time-to-event"/><definition value="time-to-event"/></concept><concept><code value="not-specified"/><display value="not-specified"/><definition value="not-specified"/></concept></CodeSystem>