<?xml version="1.0" encoding="UTF-8"?>
<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="variable-handling"/>
  <meta>
    <lastUpdated value="2023-03-26T15:21:02.749+11:00"/>
    <profile value="http://hl7.org/fhir/StructureDefinition/shareablecodesystem"/>
  </meta>
  <text>
    <status value="generated"/>
    <div value="&lt;div xmlns=&quot;http://www.w3.org/1999/xhtml&quot;&gt;
            &lt;p&gt;This code system 
              &lt;code&gt;http://hl7.org/fhir/variable-handling&lt;/code&gt; defines the following codes:
            &lt;/p&gt;
            &lt;table class=&quot;codes&quot;&gt;
              &lt;tr&gt;
                &lt;td style=&quot;white-space:nowrap&quot;&gt;
                  &lt;b&gt;Code&lt;/b&gt;
                &lt;/td&gt;
                &lt;td&gt;
                  &lt;b&gt;Display&lt;/b&gt;
                &lt;/td&gt;
                &lt;td&gt;
                  &lt;b&gt;Definition&lt;/b&gt;
                &lt;/td&gt;
              &lt;/tr&gt;
              &lt;tr&gt;
                &lt;td style=&quot;white-space:nowrap&quot;&gt;continuous
                  &lt;a name=&quot;variable-handling-continuous&quot;&gt; &lt;/a&gt;
                &lt;/td&gt;
                &lt;td&gt;continuous variable&lt;/td&gt;
                &lt;td&gt;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).&lt;/td&gt;
              &lt;/tr&gt;
              &lt;tr&gt;
                &lt;td style=&quot;white-space:nowrap&quot;&gt;dichotomous
                  &lt;a name=&quot;variable-handling-dichotomous&quot;&gt; &lt;/a&gt;
                &lt;/td&gt;
                &lt;td&gt;dichotomous variable&lt;/td&gt;
                &lt;td&gt;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).&lt;/td&gt;
              &lt;/tr&gt;
              &lt;tr&gt;
                &lt;td style=&quot;white-space:nowrap&quot;&gt;ordinal
                  &lt;a name=&quot;variable-handling-ordinal&quot;&gt; &lt;/a&gt;
                &lt;/td&gt;
                &lt;td&gt;ordinal variable&lt;/td&gt;
                &lt;td&gt;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).&lt;/td&gt;
              &lt;/tr&gt;
              &lt;tr&gt;
                &lt;td style=&quot;white-space:nowrap&quot;&gt;polychotomous
                  &lt;a name=&quot;variable-handling-polychotomous&quot;&gt; &lt;/a&gt;
                &lt;/td&gt;
                &lt;td&gt;polychotomous variable&lt;/td&gt;
                &lt;td&gt;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.&lt;/td&gt;
              &lt;/tr&gt;
            &lt;/table&gt;
          &lt;/div&gt;"/>
  </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="trial-use"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="5"/>
  </extension>
  <url value="http://hl7.org/fhir/variable-handling"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.1956"/>
  </identifier>
  <version value="5.0.0"/>
  <name value="EvidenceVariableHandling"/>
  <title value="Evidence Variable Handling"/>
  <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"/>
  <content value="complete"/>
  <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>
</CodeSystem>