{
  "resourceType": "Group",
  "id": "example-outcomedefinition-hba1c-at-12-months",
  "meta": {
    "versionId": "6",
    "lastUpdated": "2025-03-15T21:09:28.653Z",
    "profile": [
      "https://hl7.org/fhir/uv/ebm/StructureDefinition/outcome-definition"
    ]
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/artifact-author",
      "valueContactDetail": {
        "name": "Brian S. Alper"
      }
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "fhir"
    }
  ],
  "url": "http://hl7.org/fhir/Group/example-outcomedefinition-hba1c-at-12-months",
  "name": "HbA1c at 12 months",
  "title": "OutcomeDefinition: HbA1c at 12 months",
  "status": "active",
  "publisher": "HL7 International / FHIR Infrastructure",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/fiwg"
        }
      ]
    }
  ],
  "description": "HbA1c at 12 months as the endpoint (outcome measure)",
  "copyright": "https://creativecommons.org/licenses/by-nc-sa/4.0/",
  "membership": "conceptual",
  "characteristic": [
    {
      "code": {
        "text": "Observation"
      },
      "valueCodeableConcept": {
        "coding": [
          {
            "system": "http://loinc.org",
            "code": "4548-4",
            "display": "Hemoglobin A1c/Hemoglobin.total in Blood"
          }
        ]
      },
      "exclude": false,
      "description": "HbA1c at 12 months",
      "relativeTime": [
        {
          "contextCode": {
            "coding": [
              {
                "system": "http://snomed.info/sct",
                "code": "709491003",
                "display": "Enrollment in clinical trial"
              }
            ]
          },
          "offsetDuration": {
            "value": 12,
            "unit": "months",
            "system": "http://unitsofmeasure.org",
            "code": "mo"
          },
          "text": "at 12 months"
        }
      ]
    }
  ]
}