High International normalised ratio (INR)

PH3454 / 8496

OpenSAFELY

Jan 26, 2026

REGISTERING DOI...

OpenCodelists Phenotype

  1. Overview

    Codelist ID
    opensafely/high-international-normalised-ratio-inr
    Version ID
    65c1caf5
    Version Tag
    2020-10-22
    Coding System
    Read codes v3
    Collections
    OpenCodelistPhenotype Library
    Tags
    No data

  2. Definition

    This codelist was taken from OpenCodelists, created by OpenSAFELY. We recommend viewing this Phenotype on the OpenCodelist website to view the most recent version.

    This codelist is used to identify INR blood tests that are explicitly considered to be high.

    © University of Oxford for the Bennett Institute for Applied Data Science 2025. This work may be copied freely for non-commercial research and study.

  3. Methodology

    This codelist was developed using OpenCodelists CTV3 definition builder. Term searches included

    • International normalised ratio
    • INR raised

    This codelist only contains codes where INR may be considered explicitly raised and does not include codes where INR may be outside range but not clear whether it is high or low for example International normalised ratio deviation from target(XaJel).

    This codelist should be combined with INR result values to identify high INRs.

  4. References

    Source Reference

    https://www.opencodelists.org/codelist/opensafely/high-international-normalised-ratio-inr/2020-10-22

    References

  5. Clinical Codelist

  6. API

    To Export Phenotype Details:

    FormatAPI
    JSON site_root/api/v1/phenotypes/PH3454/version/8496/detail/?format=json
    R Package

    # Download here

    library(ConceptLibraryClient)


    # Connect to API

    client = ConceptLibraryClient::Connection$new(public=TRUE)


    # Get details of Phenotype

    phenotype_details = client$phenotypes$get_detail(
     'PH3454',
     version_id=8496
    )

    Py Package

    # Download here

    from pyconceptlibraryclient import Client


    # Connect to API

    client = Client(public=True)


    # Get details of Phenotype

    phenotype_detail = client.phenotypes.get_detail(
     'PH3454',
     version_id=8496
    )

    To Export Phenotype Code List:

    FormatAPI
    JSON site_root/api/v1/phenotypes/PH3454/version/8496/export/codes/?format=json
    R Package

    # Download here

    library(ConceptLibraryClient)


    # Connect to API

    client = ConceptLibraryClient::Connection$new(public=TRUE)


    # Get codelist of Phenotype

    phenotype_codelist = client$phenotypes$get_codelist(
     'PH3454',
     version_id=8496
    )

    Py Package

    # Download here

    from pyconceptlibraryclient import Client


    # Connect to API

    client = Client(public=True)


    # Get codelist of Phenotype

    phenotype_codelist = client.phenotypes.get_codelist(
     'PH3454',
     version_id=8496
    )

  7. Version History

    Version IDNameOwnerPublish date
    High International normalised ratio (INR) ieuan.scanlon2026-01-26 23:18