<?xml version="1.0" encoding="UTF-8"?>
<term>
  <id>15597</id>
  <title>control group</title>
  <longtitle>IUPAC Gold Book - control group</longtitle>
  <doi>10.1351/goldbook.15597</doi>
  <code>15597</code>
  <status>current</status>
  <synonym><em>synonym</em>: comparison group</synonym>
  <definitions>
    <item>
      <id>1</id>
      <text>Selected subjects of study, identified as a rule before a study is done, which comprises humans, animals, or other species who do not have the disease, intervention, procedure, or whatever is being studied, but in all other respects are as nearly identical to the test group as possible.</text>
      <sources>
        <item>PAC, 2007, 79, 1153. 'Glossary of terms used in toxicology, 2nd edition (IUPAC Recommendations 2007)' on page 1197 (https://doi.org/10.1351/pac200779071153)</item>
      </sources>
    </item>
  </definitions>
  <altoutputs>
    <html>https://goldbook.iupac.org/terms/view/15597/html</html>
    <json>https://goldbook.iupac.org/terms/view/15597/json</json>
    <plain>https://goldbook.iupac.org/terms/view/15597/plain</plain>
  </altoutputs>
  <citation>Citation: 'control group' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.15597</citation>
  <license>The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.</license>
  <collection>If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .</collection>
  <disclaimer>The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.</disclaimer>
  <accessed>2026-05-30T10:37:34+00:00</accessed>
</term>
