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type: codesystemcodesystem: variable-handling-example

Evidence Variable Handling Example

Concepts

CodeDisplayDefinition
booleanboolean variableA boolean variable is a variable which is defined to have only 2 possible values: True or False.
continuouscontinuous variableA 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).
dichotomousdichotomous variableA 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).
ordinalordinal variableAn 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).
polychotomouspolychotomous variableA 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.
time-to-eventtime-to-eventtime-to-event
not-specifiednot-specifiednot-specified

CodeSystem XML

<?xml version="1.0" encoding="UTF-8"?>

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="variable-handling-example"/>
  <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"/>
  <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)."/>
  <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>