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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Science and Innovations in Medicine</journal-id><journal-title-group><journal-title xml:lang="en">Science and Innovations in Medicine</journal-title><trans-title-group xml:lang="ru"><trans-title>Наука и инновации в медицине</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2500-1388</issn><issn publication-format="electronic">2618-754X</issn><publisher><publisher-name xml:lang="en">FSBEI of Higher Education SamSMU of Ministry of Health of the Russian Federation</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">321351</article-id><article-id pub-id-type="doi">10.35693/2500-1388-2023-8-4-233-238</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Gerontology and geriatrics</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Геронтология и гериатрия</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Are thyroid hormone levels and sarcopenia in elderly patients associated with type 2 diabetes mellitus and euthyroidism?</article-title><trans-title-group xml:lang="ru"><trans-title>Связаны ли уровни гормонов щитовидной железы и саркопения у пожилых пациентов с сахарным диабетом 2 типа и эутиреозом?</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0027-1786</contrib-id><name-alternatives><name xml:lang="en"><surname>Bulgakova</surname><given-names>Svetlana V.</given-names></name><name xml:lang="ru"><surname>Булгакова</surname><given-names>Светлана Викторовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Associate professor, Head of the Department of Endocrinology and Geriatrics</p></bio><bio xml:lang="ru"><p>д-р мед. наук, доцент, заведующая кафедрой эндокринологии и гериатрии</p></bio><email>s.v.bulgakova@samsmu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0097-7252</contrib-id><name-alternatives><name xml:lang="en"><surname>Treneva</surname><given-names>Ekaterina V.</given-names></name><name xml:lang="ru"><surname>Тренева</surname><given-names>Екатерина Вячеславовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Associate professor, Department of Endocrinology and Geriatrics</p></bio><bio xml:lang="ru"><p>канд. мед. наук, доцент кафедры эндокринологии и гериатрии</p></bio><email>e.v.treneva@samsmu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4114-5233</contrib-id><name-alternatives><name xml:lang="en"><surname>Kurmaev</surname><given-names>Dmitrii P.</given-names></name><name xml:lang="ru"><surname>Курмаев</surname><given-names>Дмитрий Петрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, assistant of the Department of Endocrinology and Geriatrics</p></bio><bio xml:lang="ru"><p>канд. мед. наук, ассистент кафедры эндокринологии и гериатрии</p></bio><email>d.p.kurmaev@samsmu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7519-7360</contrib-id><name-alternatives><name xml:lang="en"><surname>Chetverikova</surname><given-names>Irina S.</given-names></name><name xml:lang="ru"><surname>Четверикова</surname><given-names>Ирина Сергеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>a postgraduate student, Department of Endocrinology and Geriatrics</p></bio><bio xml:lang="ru"><p>аспирант кафедры эндокринологии и гериатрии</p></bio><email>chetverikova_irina@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Samara State Medical University</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Самарский государственный медицинский университет» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-11-03" publication-format="electronic"><day>03</day><month>11</month><year>2023</year></pub-date><volume>8</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>233</fpage><lpage>238</lpage><history><date date-type="received" iso-8601-date="2023-03-14"><day>14</day><month>03</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-05-20"><day>20</day><month>05</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Bulgakova S.V., Treneva E.V., Kurmaev D.P., Chetverikova I.S.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Булгакова С.В., Тренева Е.В., Курмаев Д.П., Четверикова И.С.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Bulgakova S.V., Treneva E.V., Kurmaev D.P., Chetverikova I.S.</copyright-holder><copyright-holder xml:lang="ru">Булгакова С.В., Тренева Е.В., Курмаев Д.П., Четверикова И.С.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://innoscience.ru/2500-1388/article/view/321351">https://innoscience.ru/2500-1388/article/view/321351</self-uri><abstract xml:lang="en"><p><bold>Aim</bold> – to study the relationship between thyroid function parameters (free T3 (FT3), free T4 (FT4), FT3/FT4 ratio), thyroid-stimulating hormone (TSH) and parameters characterizing sarcopenia (muscle mass and strength, physical performance) in patients with type 2 diabetes mellitus (T2DM) and euthyroidism.</p> <p><bold>Material and methods. </bold>The study included 312 elderly patients with T2DM in a state of euthyroidism (mean age 65.39 ± 2.28 years). In all participants the following parameters were measured: anthropometric parameters, thyroid hormones (FT3, FT4), TSH, fasting blood glucose, glycated hemoglobin (HbA1c), fasting C-peptide and insulin, lipid profile, body composition, handgrip strength, walking speed.</p> <p><bold>Results. </bold>Sarcopenia was prevalent in 26.9% of T2DM patients with euthyroidism. A binary logistic regression analysis adjusted for age, gender, smoking and alcohol consumption, T2DM duration, hypertension, HbA1c level, eGFR, TG, HDL and fat mass fraction showed that the high-normal FT3 level (OR = 0.522, 95% CI: 0.304–0.895, p = 0.018), a low-normal FT4 level (OR = 1.126, 95% CI: 1.009–1.258, p = 0.034) and an increased FT3/FT4 ratio (OR = 0.923, 95% CI: 0.879–0.969, p = 0.001) were associated with a low prevalence of sarcopenia. FT3 concentration was positively associated with muscle strength (OR = 0.525, 95% CI: 0.305–0.902, p = 0.020) and walking speed (OR = 0.443, 95% CI: 0.259–0.758, p = 0.003), while FT4 concentration was negatively associated with muscle mass (OR = 1.114, 95% CI: 1.009–1.232, p = 0.036). The FT3/FT4 ratio was positively associated with muscle mass (OR = 0.943, 95% CI: 0.905–0.981, p = 0.006), muscle strength (OR = 0.945, 95% CI: 0.901–0.992, p = 0.021), and walking speed (OR = 0.934, 95% CI: 0.894–0.975, p = 0.002). TSH levels were not associated with sarcopenia.</p> <p><bold>Conclusion.</bold> The high FT3/FT4 ratio is significantly associated with a low risk of sarcopenia in T2DM patients with euthyroidism.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель</bold> – изучить взаимосвязь показателей функции щитовидной железы (FT3, FT4, FT3/FT4 и ТТГ) и параметров, характеризующих саркопению (мышечные масса и сила, физическая работоспособность) у пациентов с СД2 и эутиреозом.</p> <p><bold>Материал и методы.</bold> В исследовании приняли участие 312 пожилых пациентов с сахарным диабетом 2 типа (СД2) в состоянии эутиреоза (средний возраст 65,39 ± 2,28 года). Всем участникам определяли антропометрические показатели, гормоны щитовидной железы (свободный Т3 (FT3), свободный Т4 (FT4), тиреотропный гормон (ТТГ)), глюкозу крови натощак, гликированный гемоглобин (HbA1c), C-пептид и инсулин натощак, показатели липидного профиля, композиционный состав тела, силу хвата кисти, скорость ходьбы.</p> <p><bold>Результаты. </bold>Распространенность саркопении у пациентов с СД2 в состоянии эутиреоза составила 26,9%. Бинарный логистический регрессионный анализ с поправкой на возраст, пол, курение и употребление алкоголя, продолжительность СД2, гипертензию, уровень HbA1c, рСКФ, ТГ, ЛПВП и долю жировой массы показал, что высоконормальный уровень FT3 (отношение шансов (ОШ) = 0,522, 95% доверительный интервал (ДИ): 0,304–0,895, p = 0,018), низконормальный уровень FT4 (ОШ = 1,126, 95% ДИ: 1,009–1,258, p = 0,034) и повышенное отношение FT3/FT4 (ОШ = 0,923, 95% ДИ: 0,879–0,969, p = 0,001) связаны с низкой распространенностью саркопении. Концентрация FT3 положительно связана с мышечной силой (ОШ = 0,525, 95% ДИ: 0,305–0,902, р = 0,020) и скоростью ходьбы (ОШ = 0,443, 95% ДИ: 0,259–0,758, р = 0,003), а концентрация FT4 отрицательно связана с мышечной массой (ОШ = 1,114, 95% ДИ: 1,009–1,232, p = 0,036). Соотношение FT3/FT4 положительно связано с мышечной массой (ОШ = 0,943, 95% ДИ: 0,905–0,981, p = 0,006), мышечной силой (ОШ = 0,945, 95% ДИ: 0,901–0,992, p = 0,021) и скоростью ходьбы (ОШ = 0,934, 95% ДИ: 0,894–0,975, р = 0,002). Концентрация ТТГ с саркопенией не связана.</p> <p><bold>Заключение.</bold> Высокое соотношение FT3/FT4 достоверно связано с низким риском саркопении у пациентов с СД2 в состоянии эутиреоза.</p></trans-abstract><kwd-group xml:lang="en"><kwd>gerontology</kwd><kwd>sarcopenia</kwd><kwd>bioimpedance analysis</kwd><kwd>body composition</kwd><kwd>thyroid gland</kwd><kwd>euthyroidism</kwd><kwd>type 2 diabetes mellitus</kwd><kwd>thyroid hormones</kwd><kwd>glycated hemoglobin</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>геронтология</kwd><kwd>саркопения</kwd><kwd>биоимпедансный анализ</kwd><kwd>композиционный состав тела</kwd><kwd>щитовидная железа</kwd><kwd>эутиреоз</kwd><kwd>сахарный диабет 2 типа</kwd><kwd>гормоны щитовидной железы</kwd><kwd>гликированный гемоглобин</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Huang JX, Liao YF, Li YM. 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