[
  {
    "phenotype_id": "PH3434",
    "phenotype_version_id": 8473,
    "name": "Glycated haemoglobin (HbA1c) tests — IFCC standardised",
    "definition": "This codelist was taken from [OpenCodelists](https://www.opencodelists.org/), created by [OpenSAFELY](https://www.opensafely.org/). We recommend viewing this Phenotype on the OpenCodelist website to view the most recent version.\n\n\nA CTV3 codelist for patients receiving monitoring of glycated haemoglobin (HbA1c) tests using reference methods standardised by the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC).\n\n\nNote that for tests before 2018, test values in the East region appear to be recorded on a different scale (approximately 4 to 8\\-times greater than mean values in other regions). This issue is being investigated.\n\n\n© University of Oxford for the Bennett Institute for Applied Data Science 2025\\. This work may be copied freely for non\\-commercial research and study.\n\n",
    "implementation": null,
    "publications": null,
    "validation": null,
    "citation_requirements": null,
    "created": "2026-01-26T23:17:23.608831Z",
    "author": "OpenSAFELY",
    "collections": [
      {
        "name": "OpenCodelist",
        "value": 31
      },
      {
        "name": "Phenotype Library",
        "value": 18
      }
    ],
    "tags": null,
    "organisation": {
      "id": 1,
      "slug": "opensafely",
      "name": "OpenSAFELY"
    },
    "world_access": 1,
    "updated": "2026-01-26T23:17:23.603600Z",
    "references": [
      {
        "url": "https://github.com/opensafely/codelist-development/issues/76",
        "title": "GitHub Issue"
      }
    ],
    "signed_off": [],
    "methodology": "Codes under the CTV3 concept for IFCC\\-standardised HbA1c were included.\n\n",
    "coding_system": [
      {
        "name": "Read codes v3",
        "value": 6
      }
    ],
    "open_codelist_id": "opensafely/glycated-haemoglobin-hba1c-tests-ifcc",
    "source_reference": "https://www.opencodelists.org/codelist/opensafely/glycated-haemoglobin-hba1c-tests-ifcc/6d7287f8",
    "concept_information": [
      {
        "concept_id": 8650,
        "concept_version_id": 16135,
        "concept_name": "opensafely/glycated-haemoglobin-hba1c-tests-ifcc/6d7287f8",
        "coding_system": {
          "id": 6,
          "name": "Read codes v3",
          "description": "Read codes v3"
        },
        "phenotype_id": "PH3434",
        "phenotype_version_id": 8473,
        "phenotype_name": "Glycated haemoglobin (HbA1c) tests — IFCC standardised",
        "code_attribute_header": [],
        "codes": [
          {
            "code": "Xaezd",
            "description": "HbA1c level (diagnostic reference range) - IFCC standardised",
            "attributes": null
          },
          {
            "code": "Xaeze",
            "description": "HbA1c level (monitoring ranges) - IFCC standardised",
            "attributes": null
          },
          {
            "code": "XaPbt",
            "description": "Haemoglobin A1c level - IFCC standardised",
            "attributes": null
          }
        ]
      }
    ],
    "coding_system_release": "",
    "open_codelist_version_id": "6d7287f8",
    "open_codelist_version_tag": "",
    "status": 1,
    "doi": "https://doi.org/10.48533/qg2w-hy06",
    "is_deleted": false,
    "publish_status": 2,
    "owner": "ieuan.scanlon",
    "template": {
      "id": 3,
      "name": "OpenCodelists Phenotype",
      "description": "OpenSafely's OpenCodelist Phenotype, visit https://www.opencodelists.org/ to learn more",
      "version_id": 1
    },
    "versions": [
      {
        "version_id": 8473,
        "version_name": "Glycated haemoglobin (HbA1c) tests  IFCC standardised",
        "version_date": "2026-01-26T23:17:23.615804Z",
        "is_published": true,
        "is_latest": true
      }
    ]
  }
]