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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">rpcardio</journal-id><journal-title-group><journal-title xml:lang="en">Rational Pharmacotherapy in Cardiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Рациональная Фармакотерапия в Кардиологии</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1819-6446</issn><issn pub-type="epub">2225-3653</issn><publisher><publisher-name>«SILICEA-POLIGRAF» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20996/1819-6446-2021-04-07</article-id><article-id custom-type="elpub" pub-id-type="custom">rpcardio-2433</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="en"><subject>PAGES OF RUSSIAN NATIONAL SOCIETY OF EVIDENCE-BASED PHARMACOTHERAPY</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>СТРАНИЦЫ НАЦИОНАЛЬНОГО ОБЩЕСТВА ДОКАЗАТЕЛЬНОЙ ФАРМАКОТЕРАПИИ</subject></subj-group></article-categories><title-group><article-title>Clinical Trials Evaluating Drug Therapy: Types, Reliability of Results, Place in Modern Evidence-Based Medicine</article-title><trans-title-group xml:lang="ru"><trans-title>Клинические исследования по оценке лекарственной терапии: виды, достоверность результатов, место в современной доказательной медицине</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 Сергеи Юрьевич – eLibrary SPIN 7908-9554</p><p>Москва</p></bio><bio xml:lang="en"><p>Sergey Yu. Martsevich - eLibrary SPIN 7908-9554</p><p>Moscow</p></bio><email xlink:type="simple">sergeymartsevich@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6395-2584</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кутишенко</surname><given-names>Н. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Kutishenko</surname><given-names>N. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кутишенко Наталья Петровна - eLibrary SPIN 7893-9865</p><p>Москва</p></bio><bio xml:lang="en"><p>Natalia P. Kutishenko - eLibrary SPIN 7893-9865</p><p>Moscow</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/0000-0001-8252-3099</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лукина</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lukina</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лукина Юлия Владимировна - eLibrary SPIN 8949-4964</p><p>Москва</p></bio><bio xml:lang="en"><p>Yulia V. Lukina - eLibrary SPIN 8949-4964</p><p>Moscow</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/0000-0002-5784-4525</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лукьянов</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Lukyanov</surname><given-names>M. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лукьянов Михаил Михайлович – eLibrary SPIN 6842-9870</p><p>Москва</p></bio><bio xml:lang="en"><p>Mikhail M. Lukyanov - eLibrary SPIN 6842-9870</p><p>Moscow</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/0000-0002-4453-8430</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Драпкина</surname><given-names>О. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Drapkina</surname><given-names>O. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Драпкина Оксана Михайловна – eLibrary SPIN 4456-1297</p><p>Москва</p></bio><bio xml:lang="en"><p>Oxana M. Drapkina - eLibrary SPIN 4456-1297</p><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный медицинский исследовательский центр терапии и профилактической медицины</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Medical Research Center for Therapy and Preventive Medicine</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>05</day><month>05</month><year>2021</year></pub-date><volume>17</volume><issue>2</issue><fpage>249</fpage><lpage>255</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Martsevich S.Y., Kutishenko N.P., Lukina Y.V., Lukyanov M.M., Drapkina O.M., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Марцевич С.Ю., Кутишенко Н.П., Лукина Ю.В., Лукьянов М.М., Драпкина О.М.</copyright-holder><copyright-holder xml:lang="en">Martsevich S.Y., Kutishenko N.P., Lukina Y.V., Lukyanov M.M., Drapkina O.M.</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.rpcardio.online/jour/article/view/2433">https://www.rpcardio.online/jour/article/view/2433</self-uri><abstract><p>The article discusses the main methods of evidence in modern medicine. Special attention is paid to randomized controlled trials and observational studies. The advantages of randomized controlled trials over observational studies are considered. A comparison of the informative value of randomized controlled trials and observational studies in assessing the effect of therapeutic interventions is made. Attention is drawn to situations when conducting randomized controlled trials is not possible and when they become the main source of information. It is emphasized that in order to verify the results of randomized controlled trials in real clinical practice, it is necessary to conduct observational studies. The basic principles of conducting observational studies are considered.</p></abstract><trans-abstract xml:lang="ru"><p>В статье рассматриваются основные способы доказательств в современной медицине. Особое внимание уделяется рандомизированным контролируемым исследованиям и наблюдательным исследованиям. Рассматриваются преимущества рандомизированных контролируемых исследований перед наблюдательными исследованиями. Проводится сравнение информативности рандомизированных контролируемых исследований и наблюдательных исследований в оценке действия лечебных вмешательств. Обращается внимание на ситуации, когда проведение рандомизированных контролируемых исследований невозможно, и когда наблюдательные исследования становятся основным источником информации. Подчеркивается, что для подтверждения результатов рандомизированных контролируемых исследований в реальной клинической практике необходимо проведение наблюдательных исследований. В статье рассматриваются основные принципы проведения наблюдательных исследований.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>рандомизированные контролируемые исследования</kwd><kwd>наблюдательные исследования</kwd><kwd>сравнение информативности</kwd><kwd>принципы проведения наблюдательных исследований</kwd></kwd-group><kwd-group xml:lang="en"><kwd>randomized controlled trials</kwd><kwd>observational studies</kwd><kwd>comparison of information content</kwd><kwd>principles of conducting observational studies</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">Jaillon P. L'essai Clinique controle randomise [Controlled randomized clinical trials]. Bull Acad Natl Med. 2007;191:739-56; discussion 756-758.</mixed-citation><mixed-citation xml:lang="en">Jaillon P. L'essai Clinique controle randomise [Controlled randomized clinical trials]. 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