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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">inovmed</journal-id><journal-title-group><journal-title xml:lang="ru">Инновационная медицина Кубани</journal-title><trans-title-group xml:lang="en"><trans-title>Innovative Medicine of Kuban</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2541-9897</issn><publisher><publisher-name>Scientific Research Institute – Ochapovsky Regional Clinical Hospital No. 1</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.35401/2541-9897-2025-10-2-40-46</article-id><article-id custom-type="elpub" pub-id-type="custom">inovmed-1189</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group></article-categories><title-group><article-title>Валидация ультразвуковых критериев вызванного Сlostridioides difficile энтероколита у пациентов с антибиотик-ассоциированной диареей на фоне COVID-19 и без такового</article-title><trans-title-group xml:lang="en"><trans-title>Validation of Ultrasonographic Criteria for Diagnosing Сlostridioides difficile Colitis in COVID-19 and Non-COVID-19 Patients With Antibiotic-Associated Diarrhea</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-0477-8552</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Руцкая</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Rutskaya</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Руцкая Ирина Александровна - врач ультразвуковой диагностики, врач-инфекционист.</p><p>Витебск</p></bio><bio xml:lang="en"><p>Iryna A. Rutskaya - Ultrasonographer, Infectious Disease Physician, Vitebsk Regional Clinical Infectious Diseases Hospital.</p><p>Vitebsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6067-3600</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пиманов</surname><given-names>С. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Pimanov</surname><given-names>S. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Пиманов Сергей Иванович - д. м. н., профессор, заведующий кафедрой внутренних болезней и ультразвуковой диагностики факультета повышения квалификации и переподготовки кадров.</p><p>210009, Витебск, пр-т Фрунзе, 27</p></bio><bio xml:lang="en"><p>Sergey I. Pimanov - Dr. Sci. (Med.), Professor, Head of the Department of Internal Diseases and Diagnostic Ultrasound, Faculty of Advanced Training and Retraining, Vitebsk State Order of Peoples’ Friendship Medical University.</p><p>prospekt Frunze 27, Vitebsk, 210009</p></bio><email xlink:type="simple">pimanovs@tut.by</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Витебская областная клиническая инфекционная больница</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Vitebsk Regional Clinical Infectious Diseases Hospital</institution><country>Belarus</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Витебский государственный ордена Дружбы народов медицинский университет</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Vitebsk State Order of Peoples’ Friendship Medical University</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>30</day><month>06</month><year>2025</year></pub-date><volume>10</volume><issue>2</issue><fpage>40</fpage><lpage>46</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Руцкая И.А., Пиманов С.И., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Руцкая И.А., Пиманов С.И.</copyright-holder><copyright-holder xml:lang="en">Rutskaya I.A., Pimanov S.I.</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://www.innovmedkub.ru/jour/article/view/1189">https://www.innovmedkub.ru/jour/article/view/1189</self-uri><abstract><sec><title>Цель</title><p>Цель: Оценить валидность разработанных ультразвуковых критериев наличия энтероколита, вызванного Сlostridioides (ранее Clostridium) difficile (C. difficile) на фоне COVID-19 и без такового.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы: Обследовано 253 человека (85 мужчин и 168 женщин) в возрасте от 18 до 100 лет с антибиотик-ассоциированной диареей. Диагноз энтероколита, вызванного C. difficile, был верифицирован у 86 из 136 пациентов с COVID-19, и у 75 из 117 пациентов без COVID-19. Использовались разработанные ранее критерии ультразвуковой диагностики наличия энтероколита, вызванного C. difficile, при антибиотик-ассоциированной диарее. Внутренняя валидация пороговых значений ультразвукового показателя толщины стенки толстой кишки проводилась методом бутстреп (bootstrap) с использованием основной группы в соответствии с рекомендациями TRIPOD и алгоритмом PROBAST.</p></sec><sec><title>Результаты</title><p>Результаты: При проведении внутренней валидации установлено, что определенные пороговые значения толщины кишечной стенки устойчивы к изменению данных в целевой популяции. Эти результаты подтверждают хорошую обобщающую способность предложенных пороговых значений толщины стенки толстой кишки.</p></sec><sec><title>Заключение</title><p>Заключение: Установленные ультразвуковые критерии наличия энтероколита, вызванного C. difficile, включающие утолщение стенки толстой кишки более 4,0 мм у пациентов с антибиотик-ассоциированной диареей на фоне COVID-19 и более 3,2 мм у пациентов с антибиотик-ассоциированной диареей без COVID-19, являются валидными и могут эффективно применяться в условиях реальной клинической практики.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Objective</title><p>Objective: To assess the validity of developed ultrasonographic criteria for diagnosing Clostridioides (formerly Clostridium) difficile (C difficile) colitis in COVID-19 and non-COVID-19 patients.</p></sec><sec><title>Materials and methods</title><p>Materials and methods: We examined 253 patients (85 men and 168 women) aged 18-100 years with antibiotic-associated diarrhea (AAD). The diagnosis of C difficile colitis was verified in 86 of 136 COVID-19 patients and in 75 of 117 non-COVID-19 patients.</p><p>We used the developed ultrasonographic criteria for diagnosing C difficile colitis in the patients with AAD. Internal validation of cut-off values of colon wall thickness was performed by means of a bootstrap method using the main group according to the Transparent Reporting of a Multivariable Prediction Model for Individual Prognosis or Diagnosis guidelines and the Prediction Model Risk of Bias Assessment Tool algorithm.</p></sec><sec><title>Results</title><p>Results: The internal validation revealed that the determined cutoff values of colon wall thickness were resistant to data variation in the target population, confirming great generalizability of the proposed cutoff values.</p></sec><sec><title>Conclusions</title><p>Conclusions: The established ultrasonographic criteria for diagnosing C difficile colitis (colon wall thickness greater than 4.0 mm in COVID-19 patients with AAD and greater than 3.2 mm in non-COVID-19 patients with AAD) are valid and can be effectively used in clinical practice.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>ультразвуковая диагностика</kwd><kwd>антибиотик-ассоциированная диарея</kwd><kwd>Сlostridioides difficile</kwd><kwd>ободочная кишка</kwd><kwd>валидация</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ultrasonography</kwd><kwd>antibiotic-associated diarrhea</kwd><kwd>Сlostridioides difficile</kwd><kwd>colon</kwd><kwd>validation</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">Lash TL, Olshan AF. 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