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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">sechenov</journal-id><journal-title-group><journal-title xml:lang="en">Sechenov Medical Journal</journal-title><trans-title-group xml:lang="ru"><trans-title>Сеченовский вестник</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2218-7332</issn><issn pub-type="epub">2658-3348</issn><publisher><publisher-name>Сеченовский Университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.47093/2218-7332.2021.12.1.4-17</article-id><article-id custom-type="elpub" pub-id-type="custom">sechenov-283</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>BIOMEDICAL STATISTICS TUTORIAL</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>РУКОВОДСТВО ПО БИОМЕДИЦИНСКОЙ СТАТИСТИКЕ</subject></subj-group></article-categories><title-group><article-title>Studies and research design in medicine</article-title><trans-title-group xml:lang="ru"><trans-title>Дизайн научных исследований в 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/0000-0002-3989-2590</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Буланов</surname><given-names>Н. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Bulanov</surname><given-names>N. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Буланов Николай Михайлович, канд. мед. наук, доцент кафедры внутренних, профессиональных болезней и ревматологии</p><p>ул. Трубецкая, д. 8, стр. 2, г. Москва, 119991</p></bio><bio xml:lang="en"><p>Nikolay M. Bulanov, Cand. of Sci. (Medicine), Associate Professor, Department of Internal, Occupational Diseases and Rheumatology</p><p>8/2, Trubetskaya str., Moscow, 119991</p></bio><email xlink:type="simple">bulanov_n_m@sechenov.staff.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/0000-0002-0194-6389</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Блюсс</surname><given-names>О. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Blyuss</surname><given-names>O. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Блюсс Олег Борисович, канд. физ.-мат. наук, доцент кафедры педиатрии и детских инфекционных болезней; старший преподаватель</p><p>Колледж Лейн, Хатфилд, AL10 9AB</p></bio><bio xml:lang="en"><p>Oleg B. Blyuss, Cand. of Sci. (Phys. and Math.), Associate Professor, Department of Paediatrics and Paediatric Infectious Diseases; Senior Lecturer</p><p>College Lane, Hatfield, AL10 9AB</p><p> </p></bio><email xlink:type="simple">o.blyuss@herts.ac.uk</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9652-6856</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мунблит</surname><given-names>Д. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Munblit</surname><given-names>D. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мунблит Даниил Борисович, PhD, профессор кафедры педиатрии и детских инфекционных болезней; Почетный старший преподаватель, Секция воспаления, регенерации и развития, Национальный институт сердца и легких, Медицинский факультет</p><p>Эксибишн роуд, Южный Кенсингтон, Лондон, SW7 2BU</p></bio><bio xml:lang="en"><p>Daniil B. Munblit, PhD, Professor, Department of Paediatrics and Paediatric Infectious Diseases;  Honorary Senior Lecturer, Inflammation, Repair and Development Section, National Heart and Lung Institute, Faculty of Medicine</p><p>Exhibition Rd, South Kensington, London, SW7 2BU</p></bio><email xlink:type="simple">daniel.munblit08@imperial.ac.uk</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4291-5052</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Неклюдов</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nekliudov</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Неклюдов Никита Андреевич, студент клинического института детского здоровья им. Н.Ф. Филатова</p><p>ул. Трубецкая, д. 8, стр. 2, г. Москва, 119991</p></bio><bio xml:lang="en"><p>Nikita A. Nekliudov, student, Institute of Child’s Health named after N.F. Filatov</p><p>8/2, Trubetskaya str., Moscow, 119991</p></bio><email xlink:type="simple">n.kit.md@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2173-0566</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бутнару</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Butnaru</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бутнару Денис Викторович, канд. мед. наук, проректор по научной работе</p><p>ул. Трубецкая, д. 8, стр. 2, г. Москва, 119991</p></bio><bio xml:lang="en"><p>Denis V. Butnaru, Cand. of Sci. (Medicine), Vice-rector for Research</p><p>8/2, Trubetskaya str., Moscow, 119991</p></bio><email xlink:type="simple">butnaru_d_v@sechenov.staff.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/0000-0001-7510-6553</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кодзоева</surname><given-names>Х. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Kodzoeva</surname><given-names>K. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кодзоева Хава Багаудиновна, аспирант кафедры пропедевтики внутренних болезней, гастроэнтерологии и гепатологии</p><p>ул. Трубецкая, д. 8, стр. 2, г. Москва, 119991</p></bio><bio xml:lang="en"><p>Khava B. Kodzoeva, Postgraduate Student, Department of Internal Medicine Propaedeutics, Gastroenterology and Hepatology</p><p>8/2, Trubetskaya str., Moscow, 119991</p></bio><email xlink:type="simple">nmbulanov@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1210-2528</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Надинская</surname><given-names>М. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Nadinskaya</surname><given-names>M. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Надинская Мария Юрьевна, канд. мед. наук, доцент кафедры пропедевтики внутренних болезней, гастроэнтерологии и гепатологии</p><p>ул. Трубецкая, д. 8, стр. 2, г. Москва, 119991</p></bio><bio xml:lang="en"><p>Maria Yu. Nadinskaia, Cand. of Sci. (Medicine), Associate Professor, Department of Internal Medicine Propaedeutics, Gastroenterology and Hepatology</p><p>8/2, Trubetskaya str., Moscow, 119991</p></bio><email xlink:type="simple">nadinskaya_m_yu@staff.sechenov.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/0000-0001-7540-1130</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Заикин</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaikin</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Заикин Алексей Анатольевич, канд. физ.-мат. наук, заместитель директора Центра анализа сложных систем; профессор системной медицины, Институт женского здоровья и кафедра математики</p><p>Гоуэр стрит, Лондон, WC1E 6BT</p></bio><bio xml:lang="en"><p>Alexey A. Zaikin, Cand. of Sci. (Phys. and Math.), Deputy Director, Centre for Analysis of Complex Systems; Professor of Systems Medicine, Institute for Women’s Health and Department of Mathematics</p><p>Gower str., London, WC1E 6BT</p></bio><email xlink:type="simple">alexey.zaikin@ucl.ac.uk</email><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГАОУ ВО «Первый Московский государственный медицинский университет им. И.М. Сеченова» Минздрава России (Сеченовский Университет)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Sechenov First Moscow State Medical University (Sechenov University)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГАОУ ВО «Первый Московский государственный медицинский университет им. И.М. Сеченова» Минздрава России (Сеченовский Университет); Университет Хартфордшира</institution><country>Великобритания</country></aff><aff xml:lang="en"><institution>Sechenov First Moscow State Medical University (Sechenov University); University of Hertfordshire</institution><country>United Kingdom</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>ФГАОУ ВО «Первый Московский государственный медицинский университет им. И.М. Сеченова» Минздрава России (Сеченовский Университет); Имперский колледж Лондона</institution><country>Великобритания</country></aff><aff xml:lang="en"><institution>Sechenov First Moscow State Medical University (Sechenov University); &#13;
Imperial College London</institution><country>United Kingdom</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>ФГАОУ ВО «Первый Московский государственный медицинский университет им. И.М. Сеченова» Минздрава России (Сеченовский Университет); Университетский колледж Лондона</institution><country>Великобритания</country></aff><aff xml:lang="en"><institution>Sechenov First Moscow State Medical University (Sechenov University);&#13;
University College London</institution><country>United Kingdom</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>29</day><month>04</month><year>2021</year></pub-date><volume>12</volume><issue>1</issue><fpage>4</fpage><lpage>17</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Bulanov N.M., Blyuss O.B., Munblit D.B., Nekliudov N.A., Butnaru D.V., Kodzoeva K.B., Nadinskaya M.Y., Zaikin A.A., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Буланов Н.М., Блюсс О.Б., Мунблит Д.Б., Неклюдов Н.А., Бутнару Д.В., Кодзоева Х.Б., Надинская М.Ю., Заикин А.А.</copyright-holder><copyright-holder xml:lang="en">Bulanov N.M., Blyuss O.B., Munblit D.B., Nekliudov N.A., Butnaru D.V., Kodzoeva K.B., Nadinskaya M.Y., Zaikin A.A.</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.sechenovmedj.com/jour/article/view/283">https://www.sechenovmedj.com/jour/article/view/283</self-uri><abstract><p>Adequate design is an essential condition for conducting a successful study. This review describes the most common types of research design in medicine. We discuss the differences between different types of observational and interventional studies, their advantages and limitations providing examples for each study design. The concept of bias and its potential sources in different studies are covered. We suggest the most suitable approaches to study design for different research objectives and outline approaches to data presentation. During the last decades, several guidelines for conducting and reporting different types of research were proposed and they are also covered in this manuscript.</p></abstract><trans-abstract xml:lang="ru"><p>Адекватный дизайн является необходимым условием для проведения успешного научного исследования. В настоящем обзоре представлены основные типы дизайна научных исследований в области медицины. Авторы обсуждают основные различия между несколькими видами наблюдательных и интервенционных исследований, а также их преимущества и недостатки на примере опубликованных статей. В обзоре представлена концепция систематических ошибок и их возможные причины. Обсуждаются подходы к выбору дизайна исследования в зависимости от задач исследования, а также методы описания результатов. В тексте даны ссылки на рекомендации по организации и представлению результатов различных типов исследований, которые были предложены за последние годы.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>статистика</kwd><kwd>клиническое наблюдение</kwd><kwd>одномоментные исследования</kwd><kwd>исследования случай-контроль</kwd><kwd>когортные исследования</kwd><kwd>рандомизированные контролируемые исследования</kwd><kwd>метаанализ</kwd><kwd>систематическая ошибка</kwd></kwd-group><kwd-group xml:lang="en"><kwd>statistics</kwd><kwd>case report</kwd><kwd>cross-sectional studies</kwd><kwd>case-control studies</kwd><kwd>cohort studies</kwd><kwd>randomised controlled trials as Topic</kwd><kwd>meta-analysis as Topic</kwd><kwd>bias</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">Süt N. How can we improve the quality of scientific research and publications? 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