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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">cardiovascular</journal-id><journal-title-group><journal-title xml:lang="ru">Кардиоваскулярная терапия и профилактика</journal-title><trans-title-group xml:lang="en"><trans-title>Cardiovascular Therapy and Prevention</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1728-8800</issn><issn pub-type="epub">2619-0125</issn><publisher><publisher-name>«SILICEA-POLIGRAF» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15829/1728-8800-2025-4572</article-id><article-id custom-type="edn" pub-id-type="custom">QIGEJM</article-id><article-id custom-type="elpub" pub-id-type="custom">cardiovascular-4572</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>РЕГИСТРЫ И ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>STUDIES AND REGISTERS</subject></subj-group></article-categories><title-group><article-title>Пропущенные и ошибочные данные в клинических исследованиях: влияние на получаемый результат и способы предупреждения</article-title><trans-title-group xml:lang="en"><trans-title>Missing and incorrect data in clinical trials: impact on the final result and ways of prevention</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7717-4362</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Марцевич</surname><given-names>С. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Martsevich</surname><given-names>S. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Марцевич Сергей Юрьевич — д.м.н., профессор, руководитель отдела профилактической фармакотерапии.</p><p>Петроверигский пер., 10, стр. 3, Москва, 101990</p></bio><bio xml:lang="en"><p>Petroverigsky Lane, 10, bld. 3, Moscow, 101990</p></bio><email xlink:type="simple">sergeymartsevich@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ "Национальный медицинский исследовательский центр терапии и профилактической медицины" Минздрава России</institution></aff><aff xml:lang="en"><institution>National Medical Research Center for Therapy and Preventive Medicine</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>30</day><month>11</month><year>2025</year></pub-date><volume>24</volume><issue>10</issue><fpage>4572</fpage><lpage>4572</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Марцевич С.Ю., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Марцевич С.Ю.</copyright-holder><copyright-holder xml:lang="en">Martsevich S.Y.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://cardiovascular.elpub.ru/jour/article/view/4572">https://cardiovascular.elpub.ru/jour/article/view/4572</self-uri><abstract><p>В статье приводятся сведения о пропущенных и ошибочных данных в клинических исследованиях в области медицины и их влиянии на полученный результат. Описывается значимость "потерянных" для наблюдения больных в проспективных исследованиях и отдельных пропущенных данных у конкретного пациента. Приводится пример базы данных регистра острого коронарного синдрома с пропущенными данными. Упоминается о проблеме подложных данных. Рассматриваются различные способы восполнения пропущенных данных в клинических регистрах, а также основные принципы их предупреждения. Проводится анализ отечественных регистров острого коронарного синдрома с точки зрения упоминания о пропущенных данных и потерянных для наблюдения больных.</p></abstract><trans-abstract xml:lang="en"><p>This article presents information on missing and incorrect data in clinical trials in medicine and their impact on the results It describes the significance of lost to follow-up patients in prospective studies and individual missing data for a specific patient. An example of a database of the acute coronary syndrome (ACS) registry with missing data is given. The article also mentions the issue of fake data. It discusses various methods for filling in missing data in clinical registries and the main principles for preventing them. The article analyzes Russian ACS registris in terms of missing data and patients lost to follow-up.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>пропущенные данные</kwd><kwd>потерянные для наблюдения больные</kwd><kwd>клинические регистры</kwd><kwd>российские регистры острого коронарного синдрома</kwd></kwd-group><kwd-group xml:lang="en"><kwd>missing data</kwd><kwd>patients lost to follow-up</kwd><kwd>clinical registries</kwd><kwd>Russian acute coronary syndrome registries</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Rubin DB. Inference and missing data. Biometrika. 1976;63: 581-92.</mixed-citation><mixed-citation xml:lang="en">Rubin DB. Inference and missing data. 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