HL7 Terminology (THO)
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HL7 Terminology (THO), published by HL7 International - Vocabulary Work Group. This guide is not an authorized publication; it is the continuous build for version 7.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/UTG/ and changes regularly. See the Directory of published versions

: International Standard Randomised Controlled Trial Number

Active as of 2026-02-09

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<NamingSystem xmlns="http://hl7.org/fhir">
  <id value="ISRCTN"/>
  <language value="en"/>
  <text>
    <status value="generated"/>
    <div xml:lang="en" xmlns="http://www.w3.org/1999/xhtml" lang="en"><p class="res-header-id"><b>Generated Narrative: NamingSystem ISRCTN</b></p><a name="ISRCTN"> </a><a name="hcISRCTN"> </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">Language: en</p></div><h3>Summary</h3><table class="grid"><tr><td>Defining URL</td><td>http://terminology.hl7.org/NamingSystem/ISRCTN</td></tr><tr><td>Version</td><td>1.0.0</td></tr><tr><td>Name</td><td>ISRCTN</td></tr><tr><td>Title</td><td>International Standard Randomised Controlled Trial Number</td></tr><tr><td>Status</td><td>active</td></tr><tr><td>Definition</td><td><div><p>The ISRCTN registry is a primary clinical study registry recognised by the World Health Organisation (WHO) and the International Committee of Medical Journal Editors (ICMJE) that accepts all clinical research studies (whether proposed, ongoing or completed), providing content validation and curation and the unique identification number necessary for publication. All study records in the database are freely accessible and searchable.</p>
<p>ISRCTN supports transparency in clinical research, helps reduce selective reporting of results and ensures an unbiased and complete evidence base.</p>
<p>The registry aims to include all interventional and non-interventional clinical studies that prospectively involve UK participants and evaluate biomedical or health-related outcomes.</p>
<p>Studies conducted outside the UK or considered to be non-clinical studies (e.g. public health studies) can be registered on ISRCTN.</p>
<p>Studies should ideally be registered prospectively (before recruitment starts). ISRCTN also accepts studies registered retrospectively once they are underway or after completion.</p>
<p>See <a href="https://www.isrctn.com/">https://www.isrctn.com/</a>.</p>
</div></td></tr><tr><td>Publisher</td><td>BioMed Central (BMC)</td></tr><tr><td>Copyright</td><td><div><p>Like other registries following the clinical trial registration standards published by the World Health Organization, the ISRCTN registry exists to keep in a standard format a freely accessible and searchable record of each registered study. The Terms and Conditions enable anyone to cite with attribution the details in each study record. They encourage unrestricted use of the metadata generated during the process of registration, updating or reporting. The CC BY licence allows readers (users) to copy, distribute and transmit the Database Contribution as long as it is attributed back to the Researcher. Readers are permitted to alter, transform or build upon the Database Contribution, and to use the Database Contribution for commercial purposes. Please read full details at <a href="http://creativecommons.org/licenses/by/4.0/">http://creativecommons.org/licenses/by/4.0/</a>.</p>
</div></td></tr></table><h3>Identifiers</h3><table class="grid"><tr><td><b>Type</b></td><td><b>Value</b></td><td><b>Preferred</b></td><td><b>Period</b></td><td><b>Comment</b></td></tr><tr><td>URI</td><td>https://www.isrctn.com/ISRCTN</td><td>true</td><td>2026-02-09 --&gt; (ongoing)</td><td>This is the URL endorsed by the TSMG and is considered authoritative.</td></tr></table></div>
  </text>
  <url value="http://terminology.hl7.org/NamingSystem/ISRCTN"/>
  <version value="1.0.0"/>
  <name value="ISRCTN"/>
  <title value="International Standard Randomised Controlled Trial Number"/>
  <status value="active"/>
  <kind value="identifier"/>
  <date value="2026-02-09T00:00:00-00:00"/>
  <publisher value="BioMed Central (BMC)"/>
  <contact>
    <name
          value="ISRCTN; The Campus, 4 Crinan Street, London, N1 9XW, United Kingdom"/>
    <telecom>
      <system value="email"/>
      <value value="info@isrctn.com"/>
    </telecom>
    <telecom>
      <system value="url"/>
      <value value="https://www.isrctn.com/"/>
    </telecom>
    <telecom>
      <system value="phone"/>
      <value value="+44 (0)20 3192 2009"/>
    </telecom>
  </contact>
  <responsible value="BioMed Central (BMC)"/>
  <description
               value="The ISRCTN registry is a primary clinical study registry recognised by the World Health Organisation (WHO) and the International Committee of Medical Journal Editors (ICMJE) that accepts all clinical research studies (whether proposed, ongoing or completed), providing content validation and curation and the unique identification number necessary for publication. All study records in the database are freely accessible and searchable.

ISRCTN supports transparency in clinical research, helps reduce selective reporting of results and ensures an unbiased and complete evidence base.

The registry aims to include all interventional and non-interventional clinical studies that prospectively involve UK participants and evaluate biomedical or health-related outcomes.

Studies conducted outside the UK or considered to be non-clinical studies (e.g. public health studies) can be registered on ISRCTN.

Studies should ideally be registered prospectively (before recruitment starts). ISRCTN also accepts studies registered retrospectively once they are underway or after completion.

See [https://www.isrctn.com/](https://www.isrctn.com/)."/>
  <copyright
             value="Like other registries following the clinical trial registration standards published by the World Health Organization, the ISRCTN registry exists to keep in a standard format a freely accessible and searchable record of each registered study. The Terms and Conditions enable anyone to cite with attribution the details in each study record. They encourage unrestricted use of the metadata generated during the process of registration, updating or reporting. The CC BY licence allows readers (users) to copy, distribute and transmit the Database Contribution as long as it is attributed back to the Researcher. Readers are permitted to alter, transform or build upon the Database Contribution, and to use the Database Contribution for commercial purposes. Please read full details at [http://creativecommons.org/licenses/by/4.0/](http://creativecommons.org/licenses/by/4.0/)."/>
  <uniqueId>
    <type value="uri"/>
    <value value="https://www.isrctn.com/ISRCTN"/>
    <preferred value="true"/>
    <comment
             value="This is the URL endorsed by the TSMG and is considered authoritative."/>
    <period>
      <start value="2026-02-09"/>
    </period>
  </uniqueId>
</NamingSystem>