Definition for Code SystemEvidenceVariableHandling

{
  "resourceType" : "CodeSystem",
  "id" : "variable-handling",
  "meta" : {
    "lastUpdated" : "2025-10-26T05:47:02.408+00:00",
    "profile" : ["http://hl7.org/fhir/StructureDefinition/shareablecodesystem"]
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  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: CodeSystem variable-handling</b></p><a name=\"variable-handling\"> </a><a name=\"hcvariable-handling\"> </a><div style=\"display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%\"><p style=\"margin-bottom: 0px\"/><p style=\"margin-bottom: 0px\">Profile: <a href=\"shareablecodesystem.html\">Shareable CodeSystem</a></p></div><p>This case-sensitive code system <code>http://hl7.org/fhir/variable-handling</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-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-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-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-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-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-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-not-specified\"> </a></td><td>not-specified</td><td>not-specified</td></tr></table></div>"
  },
  "extension" : [{
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    "valueCode" : "cds"
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  {
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    "valueCode" : "trial-use"
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  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 5
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  "url" : "http://hl7.org/fhir/variable-handling",
  "identifier" : [{
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:oid:2.16.840.1.113883.4.642.4.1956"
  }],
  "version" : "6.0.0-ballot3",
  "name" : "EvidenceVariableHandling",
  "title" : "Evidence Variable Handling",
  "status" : "active",
  "experimental" : false,
  "date" : "2021-01-05T10:01:24+11:00",
  "publisher" : "HL7 (FHIR Project)",
  "contact" : [{
    "telecom" : [{
      "system" : "url",
      "value" : "http://hl7.org/fhir"
    },
    {
      "system" : "email",
      "value" : "fhir@lists.hl7.org"
    }]
  }],
  "description" : "The handling of the variable in statistical analysis for exposures or outcomes (E.g. Dichotomous, Continuous, Descriptive).",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
      "code" : "001",
      "display" : "World"
    }]
  }],
  "caseSensitive" : true,
  "valueSet" : "http://hl7.org/fhir/ValueSet/variable-handling",
  "content" : "complete",
  "concept" : [{
    "code" : "boolean",
    "display" : "boolean variable",
    "definition" : "A boolean variable is a variable which is defined to have only 2 possible values: True or False."
  },
  {
    "code" : "continuous",
    "display" : "continuous variable",
    "definition" : "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)."
  },
  {
    "code" : "dichotomous",
    "display" : "dichotomous variable",
    "definition" : "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)."
  },
  {
    "code" : "ordinal",
    "display" : "ordinal variable",
    "definition" : "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)."
  },
  {
    "code" : "polychotomous",
    "display" : "polychotomous variable",
    "definition" : "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."
  },
  {
    "code" : "time-to-event",
    "display" : "time-to-event",
    "definition" : "time-to-event"
  },
  {
    "code" : "not-specified",
    "display" : "not-specified",
    "definition" : "not-specified"
  }]
}