Evidence Based Medicine on FHIR Implementation Guide
1.0.0-ballot3 - STU 1 Ballot 3 World

Evidence Based Medicine on FHIR Implementation Guide, published by HL7 International / Clinical Decision Support. This guide is not an authorized publication; it is the continuous build for version 1.0.0-ballot3 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/ebm/ and changes regularly. See the Directory of published versions

: GroupAssignment: ExposureDefinition: Bariatric Surgery (RYGB, VSG, LAGB, BPD) vs. ComparatorDefinition: NOT Bariatric Surgery (RYGB, VSG, LAGB, BPD)

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<EvidenceVariable xmlns="http://hl7.org/fhir">
  <id value="312202"/>
  <meta>
    <versionId value="1"/>
    <lastUpdated value="2025-02-13T21:18:51.069Z"/>
    <profile
             value="http://hl7.org/fhir/uv/ebm/StructureDefinition/group-assignment"/>
  </meta>
  <language value="en"/>
  <text>
    <status value="extensions"/>
    <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: EvidenceVariable 312202</b></p><a name="312202"> </a><a name="hc312202"> </a><div style="display: inline-block; background-color: #fbffeb; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%"><p style="margin-bottom: 0px">version: 1; Last updated: 2025-02-13 21:18:51+0000</p><p style="margin-bottom: 0px">Profile: <a href="StructureDefinition-group-assignment.html">GroupAssignment</a></p></div><p><b>ArtifactPublicationStatus</b>: <span title="Codes:{http://terminology.hl7.org/CodeSystem/cited-artifact-status-type active}">Active</span></p><p><b>url</b>: <a href="EvidenceVariable-312202.html">EvidenceVariable GroupAssignment: ExposureDefinition: Bariatric Surgery (RYGB, VSG, LAGB, BPD) vs. ComparatorDefinition: NOT Bariatric Surgery (RYGB, VSG, LAGB, BPD)</a></p><p><b>identifier</b>: FEvIR Object Identifier/312202, <a href="http://terminology.hl7.org/7.5.0/NamingSystem-uri.html" title="As defined by RFC 3986 (http://www.ietf.org/rfc/rfc3986.txt)(with many schemes defined in many RFCs). For OIDs and UUIDs, use the URN form (urn:oid:(note: lowercase) and urn:uuid:). See http://www.ietf.org/rfc/rfc3001.txt and http://www.ietf.org/rfc/rfc4122.txt 

This oid is used as an identifier II.root to indicate the the extension is an absolute URI (technically, an IRI). Typically, this is used for OIDs and GUIDs. Note that when this OID is used with OIDs and GUIDs, the II.extension should start with urn:oid or urn:uuid: 

Note that this OID is created to aid with interconversion between CDA and FHIR - FHIR uses urn:ietf:rfc:3986 as equivalent to this OID. URIs as identifiers appear more commonly in FHIR.

This OID may also be used in CD.codeSystem.">Uniform Resource Identifier (URI)</a>/urn:oid:2.16.840.1.113883.4.642.40.44.24.142</p><p><b>version</b>: 1.0.0-ballot3</p><p><b>name</b>: GroupAssignment_ExposureDefinition_Bariatric_Surgery_RYGB_VSG_LAGB_BPD_vs_ComparatorDefinition_NOT_Bariatric_Surgery_RYGB_VSG_LAGB_BPD</p><p><b>title</b>: GroupAssignment: ExposureDefinition: Bariatric Surgery (RYGB, VSG, LAGB, BPD) vs. ComparatorDefinition: NOT Bariatric Surgery (RYGB, VSG, LAGB, BPD)</p><p><b>status</b>: Active</p><p><b>date</b>: 2026-11-05 14:34:28+0000</p><p><b>author</b>: Brian S. Alper, MD, MSPH: </p><p><b>publisher</b>: HL7 International / Clinical Decision Support</p><p><b>contact</b>: HL7 International / Clinical Decision Support: <a href="http://www.hl7.org/Special/committees/dss">http://www.hl7.org/Special/committees/dss</a></p><p><b>description</b>: </p><div><p>This EvidenceVariable Resource (GroupAssignment Profile) describes a 2-group study (so handling='dichotomous') and lists the 2 study arms in category.name elements. Because the definition of this EvidenceVariable Resource is fully expressed in the handling and category elements, the defintion.concept element uses a CodeableConcept for 'Defined in handling and category elements'.</p>
</div><h3>UseContexts</h3><table class="grid"><tr><td style="display: none">-</td><td><b>Code</b></td><td><b>Value[x]</b></td></tr><tr><td style="display: none">*</td><td><a href="CodeSystem-179423.html#179423-evidence-communication">Evidence Based Medicine on FHIR Implementation Guide Code System: evidence-communication</a> (Evidence Communication)</td><td><span title="Codes:{https://fevir.net/resources/CodeSystem/179423 GroupAssignment}">GroupAssignment</span></td></tr></table><p><b>copyright</b>: </p><div><p>https://creativecommons.org/licenses/by-nc-sa/4.0/</p>
</div><h3>Definitions</h3><table class="grid"><tr><td style="display: none">-</td><td><b>Concept</b></td></tr><tr><td style="display: none">*</td><td><span title="Codes:{https://fevir.net/resources/CodeSystem/179423 defined-in-handling-and-category}">Defined in handling and category elements</span></td></tr></table><p><b>handling</b>: <span title="Codes:{https://fevir.net/sevco STATO:0000090}">dichotomous variable</span></p><blockquote><p><b>category</b></p><p><b>name</b>: ExposureDefinition: Bariatric Surgery (RYGB, VSG, LAGB, BPD)</p><p><b>value</b>: <a href="Group-172423.html">ExposureDefinition: Bariatric Surgery (RYGB, VSG, LAGB, BPD)</a></p></blockquote><blockquote><p><b>category</b></p><p><b>name</b>: ComparatorDefinition: NOT Bariatric Surgery (RYGB, VSG, LAGB, BPD)</p><p><b>value</b>: <a href="Group-172424.html">ComparatorDefinition: NOT Bariatric Surgery (RYGB, VSG, LAGB, BPD)</a></p></blockquote></div>
  </text>
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             url="http://hl7.org/fhir/uv/ebm/StructureDefinition/artifact-publication-status">
    <valueCodeableConcept>
      <coding>
        <system
                value="http://terminology.hl7.org/CodeSystem/cited-artifact-status-type"/>
        <code value="active"/>
        <display value="Active"/>
      </coding>
    </valueCodeableConcept>
  </extension>
  <url value="https://fevir.net/resources/EvidenceVariable/312202"/>
  <identifier>
    <type>
      <coding>
        <system value="http://terminology.hl7.org/CodeSystem/v2-0203"/>
        <code value="ACSN"/>
        <display value="Accession ID"/>
      </coding>
      <text value="FEvIR Object Identifier"/>
    </type>
    <system value="https://fevir.net/FOI"/>
    <value value="312202"/>
    <assigner>
      <display value="Computable Publishing LLC"/>
    </assigner>
  </identifier>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.40.44.24.142"/>
  </identifier>
  <version value="1.0.0-ballot3"/>
  <name
        value="GroupAssignment_ExposureDefinition_Bariatric_Surgery_RYGB_VSG_LAGB_BPD_vs_ComparatorDefinition_NOT_Bariatric_Surgery_RYGB_VSG_LAGB_BPD"/>
  <title
         value="GroupAssignment: ExposureDefinition: Bariatric Surgery (RYGB, VSG, LAGB, BPD) vs. ComparatorDefinition: NOT Bariatric Surgery (RYGB, VSG, LAGB, BPD)"/>
  <status value="active"/>
  <date value="2026-11-05T14:34:28+00:00"/>
  <author>
    <name value="Brian S. Alper, MD, MSPH"/>
  </author>
  <publisher value="HL7 International / Clinical Decision Support"/>
  <contact>
    <name value="HL7 International / Clinical Decision Support"/>
    <telecom>
      <system value="url"/>
      <value value="http://www.hl7.org/Special/committees/dss"/>
    </telecom>
  </contact>
  <description
               value="This EvidenceVariable Resource (GroupAssignment Profile) describes a 2-group study (so handling='dichotomous') and lists the 2 study arms in category.name elements. Because the definition of this EvidenceVariable Resource is fully expressed in the handling and category elements, the defintion.concept element uses a CodeableConcept for 'Defined in handling and category elements'."/>
  <useContext>
    <code>
      <system value="https://fevir.net/resources/CodeSystem/179423"/>
      <code value="evidence-communication"/>
      <display value="Evidence Communication"/>
    </code>
    <valueCodeableConcept>
      <coding>
        <system value="https://fevir.net/resources/CodeSystem/179423"/>
        <code value="GroupAssignment"/>
        <display value="GroupAssignment"/>
      </coding>
    </valueCodeableConcept>
  </useContext>
  <copyright value="https://creativecommons.org/licenses/by-nc-sa/4.0/"/>
  <definition>
    <concept>
      <coding>
        <system value="https://fevir.net/resources/CodeSystem/179423"/>
        <code value="defined-in-handling-and-category"/>
        <display value="Defined in handling and category elements"/>
      </coding>
    </concept>
  </definition>
  <handling>
    <coding>
      <system value="https://fevir.net/sevco"/>
      <code value="STATO:0000090"/>
      <display value="dichotomous variable"/>
    </coding>
  </handling>
  <category>
    <name
          value="ExposureDefinition: Bariatric Surgery (RYGB, VSG, LAGB, BPD)"/>
    <valueReference>🔗 
      <reference value="Group/172423"/>
      <type value="Group"/>
      <display
               value="ExposureDefinition: Bariatric Surgery (RYGB, VSG, LAGB, BPD)"/>
    </valueReference>
  </category>
  <category>
    <name
          value="ComparatorDefinition: NOT Bariatric Surgery (RYGB, VSG, LAGB, BPD)"/>
    <valueReference>🔗 
      <reference value="Group/172424"/>
      <type value="Group"/>
      <display
               value="ComparatorDefinition: NOT Bariatric Surgery (RYGB, VSG, LAGB, BPD)"/>
    </valueReference>
  </category>
</EvidenceVariable>