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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">Kazan medical journal</journal-id><journal-title-group><journal-title xml:lang="en">Kazan medical journal</journal-title><trans-title-group xml:lang="ru"><trans-title>Казанский медицинский журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0368-4814</issn><issn publication-format="electronic">2587-9359</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">551845</article-id><article-id pub-id-type="doi">10.17816/KMJ551845</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Theoretical and clinical medicine</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Теоретическая и клиническая медицина</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">The role of dehydration in the development of acute kidney injury in patients with COVID-19</article-title><trans-title-group xml:lang="ru"><trans-title>Роль дегидратации в развитии острого повреждения почек у пациентов с COVID-19</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1646-3213</contrib-id><name-alternatives><name xml:lang="en"><surname>Sakaeva</surname><given-names>Elvira R.</given-names></name><name xml:lang="ru"><surname>Сакаева</surname><given-names>Эльвира Раисовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Teaching Assistant, Depart. of Therapy and Occupational Diseases, Institute of Medicine, Eco­logy and Physical Education</p></bio><bio xml:lang="ru"><p>асс., каф. терапии и профессиональных болезней, Институт медицины, экологии и физической культуры</p></bio><email>basyrova_e_r@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1213-8600</contrib-id><name-alternatives><name xml:lang="en"><surname>Shutov</surname><given-names>Aleksander М.</given-names></name><name xml:lang="ru"><surname>Шутов</surname><given-names>Александр Михайлович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>M.D., D. Sci. (Med), Prof., Depart. of Therapy and Occupational Diseases, Institute of Me­dicine, Ecology and Physical Education</p></bio><bio xml:lang="ru"><p>докт. мед. наук, проф., каф. терапии и профессиональных болезней, Институт медицины, экологии и физической культуры</p></bio><email>amshu@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7579-4824</contrib-id><name-alternatives><name xml:lang="en"><surname>Efremova</surname><given-names>Elena V.</given-names></name><name xml:lang="ru"><surname>Ефремова</surname><given-names>Елена Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>M.D., D. Sci. (Med), Assoc. Prof., Depart. of Therapy and Occupational Diseases, Institute of Medicine, Ecology and Physical Education</p></bio><bio xml:lang="ru"><p>докт. мед. наук, доц., каф. терапии и профессиональных болезней, Институт медицины, экологии и физической культуры</p></bio><email>lena_1953@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-5166-758X</contrib-id><name-alternatives><name xml:lang="en"><surname>Rebrovskaya</surname><given-names>Mariya М.</given-names></name><name xml:lang="ru"><surname>Ребровская</surname><given-names>Мария Михайловна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Teaching Assistant, Depart. of Therapy and Occupational Diseases, Institute of Medicine, Ecology and Physical Education</p></bio><bio xml:lang="ru"><p>асс., каф. терапии и профессиональных болезней, Институт медицины, экологии и физической культуры</p></bio><email>rebrovskayamary@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-4219-1596</contrib-id><name-alternatives><name xml:lang="en"><surname>Semenova</surname><given-names>Ekaterina S.</given-names></name><name xml:lang="ru"><surname>Семёнова</surname><given-names>Екатерина Сергеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Student, Institute of Medicine, Ecology and Physical Education</p></bio><bio xml:lang="ru"><p>студ., Институт медицины, экологии и физической культуры</p></bio><email>semkatser@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ulyanovsk State University</institution></aff><aff><institution xml:lang="ru">Ульяновский государственный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-09-28" publication-format="electronic"><day>28</day><month>09</month><year>2023</year></pub-date><volume>104</volume><issue>5</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>692</fpage><lpage>698</lpage><history><date date-type="received" iso-8601-date="2023-07-17"><day>17</day><month>07</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-09-22"><day>22</day><month>09</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Эко-Вектор</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-09-28"/></permissions><self-uri xlink:href="https://kazanmedjournal.ru/kazanmedj/article/view/551845">https://kazanmedjournal.ru/kazanmedj/article/view/551845</self-uri><abstract xml:lang="en"><p><bold>Background.</bold> Acute kidney injury often complicates the course of COVID-19; in many patients it develops even before hospitalization, and the reasons for its development are not sufficiently clear.</p> <p><bold>Aim.</bold> To study the role of dehydration in the development of community-onset acute kidney injury in COVID-19.</p> <p><bold>Material and methods.</bold> 329 patients with COVID-19 were examined (age 58.0±14.3 years, 172 men, 157 women). Acute kidney injury was diagnosed according to the Russian recommendations of 2020. To determine prerenal acute kidney injury, the ratio of blood urea nitrogen to blood creatinine was calculated, and to diagnose dehydration — the calculated osmolarity of blood serum. Data are presented for a normal distribution as the arithmetic mean and standard deviation (M±SD), for a non-normal distribution — as a median (Me) and interquartile range (IQR). Univariate and multivariate logistic regression analyzes were used. To assess the diagnostic significance of quantitative characteristics in predicting a certain outcome, the ROC curve analysis method was used. Differences were considered statistically significant at p &lt;0.05.</p> <p><bold>Results.</bold> Acute kidney injury was diagnosed in 70 (21.3%) patients, of which 58 (82.9%) were community-acquired. In 16 (27.6%) patients with community-onset acute kidney injury, it was of a prerenal nature, of which in 13 (81.3%) the calculated serum osmolarity exceeded 295 mOsm/L. Independent factors directly associated with prerenal prehospital acute kidney injury were estimated serum osmolarity (p &lt;0.001), C-reactive protein level (p &lt;0.001) and age (p=0.003) (R2=0.23, F=33,34).</p> <p><bold>Conclusion.</bold> Acute kidney injury complicates the course of COVID-19, and in most patients, it develops even at the prehospital stage. Estimated serum osmolarity is directly and independently associated with prerenal community-onset acute kidney injury, suggesting the important role of dehydration in its development.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Актуальность.</bold> Острое повреждение почек нередко осложняет течение COVID-19, у многих пациентов развивается ещё до госпитализации, при этом причины развития недостаточно ясны.</p> <p><bold>Цель.</bold> Изучить роль дегидратации в развитии внебольничного острого повреждения почек при COVID-19.</p> <p><bold>Материал и методы исследования.</bold> Обследованы 329 пациентов с COVID-19 (возраст 58,0±14,3 года, 172 мужчины, 157 женщин). Острое повреждение почек диагностировали согласно Российским рекомендациям 2020 г. Для определения преренального острого повреждения почек рассчитывали отношение азота мочевины крови к креатинину крови, для диагностики дегидратации — расчётную осмолярность сыворотки крови. Данные представлены для нормального распределения в виде среднего арифметического значения и стандартного отклонения (M±SD), при распределении, отличном от нормального, — в виде медианы (Me) и интерквартильного размаха (IQR). Использовали однофакторный и многофакторный логистический регрессионный анализ. Для оценки диагностической значимости количественных признаков при прогнозировании определённого исхода применялся метод анализа ROC-кривых. Различия считали статистически значимыми при р &lt;0,05.</p> <p><bold>Результаты.</bold> Острое повреждение почек диагностировано у 70 (21,3%) пациентов, из них у 58 (82,9%) оно было внебольничным. У 16 (27,6%) пациентов с внебольничным острым повреждением почек оно имело преренальный характер, из них у 13 (81,3%) расчётная осмолярность сыворотки крови превышала 295 мОсм/л. Независимыми факторами, прямо связанными с преренальным догоспитальным острым повреждением почек, были расчётная осмолярность сыворотки крови (p &lt;0,001), уровень С-реактивного белка (p &lt;0,001) и возраст (p=0,003) (R2=0,23, F=33,34).</p> <p><bold>Вывод.</bold> Острое повреждение почек осложняет течение COVID-19, а у большей части пациентов оно развивается ещё на догоспитальном этапе; расчётная осмолярность сыворотки крови прямо и независимо связана с преренальным внебольничным острым повреждением почек, что свидетельствует о важной роли дегидратации в его развитии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>acute kidney injury</kwd><kwd>COVID-19</kwd><kwd>blood urea nitrogen</kwd><kwd>blood creatinine</kwd><kwd>serum osmolarity</kwd><kwd>dehydration</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>острое повреждение почек</kwd><kwd>COVID-19</kwd><kwd>азот мочевины крови</kwd><kwd>креатинин крови</kwd><kwd>осмолярность сыворотки крови</kwd><kwd>дегидратация</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Tomilina NA, Frolova NF, Artyukhina LYu, Usatyuk SS, Buruleva TA, Djyakova EN, Frolov AV, Loss KL, Zubkin ML, Kim IG, Volgina GV. COVID-19: relationship with kidney diseases. Literature review. Nephrology and dialysis. 2021;23(2):147–159. (In Russ.) DOI: 10.28996/2618-9801-2021-2-147-159.</mixed-citation><mixed-citation xml:lang="ru">Томилина Н.А., Фролова Н.Ф., Артюхина Л.Ю., Усатюк С.С., Бурулева Т.А., .Дьякова Е.Н., Фролов А.В., Лосс К.Э., Зубкин М.Л., Ким И.Г., Волгина Г.В. COVID-19: связь с патологией почек. Обзор литературы. Нефрология и диализ. 2021;23(2):147–159. DOI: 10.28996/2618-9801-2021-2-147-159.</mixed-citation></citation-alternatives></ref><ref id="B2"><label>2.</label><mixed-citation>Guan WJ, Ni ZY, Hu Y. Clinical characteristics of coronavirus disease 2019 in China. N Engl J Med. 2020;382:1708–1720. DOI: 10.1056/NEJMoa2002032.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Fisher M, Neugarten J, Bellin E, Yunes M, Stahl L, Johns TS, Abramowitz MK, Levy R, Kumar N, Mokrzycki MH, Coco M, Dominguez M, Prudhvi K, Golestaneh L. AKI in hospitalized patients with and without COVID-19: A comparison study. J Am Soc Nephrol. 2020;31:2145–2157.</mixed-citation></ref><ref id="B4"><label>4.</label><citation-alternatives><mixed-citation xml:lang="en">Shpakov AO. Angiotensin-converting enzyme of the type 2 as a molecular mediatorfor the entry of SARS-Cov and SARS-Cov-2 viruses into the cell. Russian journal of physiology. 2020;106(7):795–810. (In Russ.) DOI: 10.31857/S0869813920060138.</mixed-citation><mixed-citation xml:lang="ru">Шпаков А.О. Ангиотензин-превращающий фермент 2-го типа, как молекулярный посредник для инфицирования клетки вирусами SARS-Cov и SARS-Cov-2. Российский физиологический журнал им. И.М. Сеченова. 2020;106(7):795–810. DOI: 10.31857/S0869813920060138.</mixed-citation></citation-alternatives></ref><ref id="B5"><label>5.</label><mixed-citation>Ronco C, Reis T, Husain-Syed F. Management of acute kidney injury in patients with COVID-19. Lancet Respir Med. 2020;8(7):738–742. DOI: 10.1016/S2213-2600(20)30229-0.</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Cheng Y, Luo R, Wang K. Kidney disease is associated with in-hospital death of patients with COVID-19. Kidney Int. 2020;97(5):829–838. DOI: 10.1016/j.kint.2020.03.005.</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Lin L, Wang X, Ren J, Sun Y, Yu R, Li K, Zheng L, Yang J. Risk factors and prognosis for COVID-19-induced acute kidney injury: A meta-analysis. BMJ Open. 2020;10(11):042573. DOI: 10.1136/bmjopen-2020-042573.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Neyra JA, Chawla LS. Acute kidney disease to chronic kidney disease. Crit Care Clin. 2021;37(2):453–474. DOI: 10.1016/j.ccc.2020.11.013.</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Ng JH, Hirsch JS, Hazzan A, Wanchoo R, Shah HH, Malieckal DA, Ross DlW, Sharma P, Sakhiya V, Fishbane S, Jhaveri KD; Northwell Nephrology COVID-19 Research Consortium. Outcomes among patients hospitalized with COVID-19 and acute kidney injury. Am J Kidney Dis. 2021;77(2):204–215. DOI: 10.1053/j.ajkd.2020.09.002.</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Kidney Disease: Improving Global Outcomes (KDIGO) Acute Kidney Injury Work Group. KDIGO clinical practice guideline for acute kidney injury. Kidney International Supplements. 2012;2(1):1–138.</mixed-citation></ref><ref id="B11"><label>11.</label><citation-alternatives><mixed-citation xml:lang="en">Clinical guidelines. Acute kidney injury. 2020. https://rusnephrology.org/wp-ontent/uploads/2020/12/AKI_final.pdf (access date: 12.06.2023). (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Клинические рекомендации. Острое повреждение почек. 2020. https://rusnephrology.org/wp-ontent/uploads/2020/12/AKI_final.pdf. (дата обращения: 12.06.2023).</mixed-citation></citation-alternatives></ref><ref id="B12"><label>12.</label><citation-alternatives><mixed-citation xml:lang="en">Efremova EV, Shutov AM, Makeeva ER, Menzorov MV, Sakaeva ER, Strakhov AA. Hypoxia inducible factor-1 (HIF-1) as a biomarker of acute kidney injury in patients with acute decompensation of chronic heart failure. Kardiologiya. 2019;59(2S):25–30. (In Russ.) DOI: 10.18087/cardio.2533.</mixed-citation><mixed-citation xml:lang="ru">Ефремова Е.В., Шутов А.М., Макеева Е.Р., Мензоров М.В., Сакаева Э.Р., Страхов А.А. Фактор, индуцируемый гипоксией-1 (HIF-1), как биомаркёр острого повреждения почек у больных с острой декомпенсацией хронической сердечной недостаточности. Кардиология. 2019;59(2S):25–30. . DOI: 10.18087/cardio.2533.</mixed-citation></citation-alternatives></ref><ref id="B13"><label>13.</label><mixed-citation>Casas-Aparicio G, Alvarado-de la Barrera C, Escamilla-Illescas D, Leon-Rodriquez I, Del Rio-Estrada PM, Calderon-Davila N, Gonzalez-Navarro M, Olmedo-Ocampo R, Castillejos-Lopez M, Figueroa-Hernandez L, Peralta-Prado A, Luna-Villalobos Y, Piten-Isidro E, Fernandez-Campos P, Avila-Rios S. Role of urinary kidney stress biomarkers for early recognition of subclinical acute kidney injury in critically ill COVID-19 patients. Biomolecules. 2022;12(2):275. DOI: 10.3390/biom12020275.</mixed-citation></ref><ref id="B14"><label>14.</label><citation-alternatives><mixed-citation xml:lang="en">Gasanov MZ, Batyushin MM, Litvinov AS, Terentyev VP. Covid-19-associated acute kidney injury: consensus report of the 25TH ACUTE DISEASE quality initiative (ADQI) workgroup: translation of recommendations. Clinical Nephrology. 2021;(1):27–49. (In Russ.) DOI: 10.18565/nephrology.2021.1.27-49.</mixed-citation><mixed-citation xml:lang="ru">Гасанов М.З., Батюшин М.М., Литвинов А.С., Терентьев В.П. Консенсусный отчёт 25-й рабочей группы "Инициативы по качеству острых заболеваний" (ADQI) по COVID-19-ассоциированному острому повреждению почек: перевод рекомендаций. Клиническая нефрология. 2021;(1):27–49. DOI: 10.18565/nephrology.2021.1.27-49.</mixed-citation></citation-alternatives></ref><ref id="B15"><label>15.</label><mixed-citation>Zheng Xizi, Yang Hongyu, Li Xiaolong, Li Haichao, Xu Lingyi, Yu Qi, Dong Yaping, Zhao Youlu, Wang Jinwei, Hou Wanyin, Zhang Xin, Li Yang, Hu Feng, Gao Hong, Lv Jicheng, Li Yang. Prevalence of kidney injury and associations with critical illness and death in patients with COVID-19. Clin J Am Soc Nephrol. 2020;15(11):1549–1556. DOI: 10.2215/CJN.04780420.</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Martínez-Rueda AJ, Alvarez RD, Mendez-Perez RA, Fernandez-Camargo DA, Gaytan-Arocha JE, Berman-Parks N, Flores-Camargo A, Comunidad-Bonilla RA, Mejia-Vilet JM, Arvizu-Hernandez M, Ramirez-Sandoval JC, Correa-Rotter R, Vega-Vega O. Community- and hospital-acquired acute kidney injury in COVID-19: Different phenotypes and dismal prognosis. Blood Purif. 2021;50(6):931–941.</mixed-citation></ref><ref id="B17"><label>17.</label><citation-alternatives><mixed-citation xml:lang="en">Sakaeva ER, Shutov AM, Efremova EV, Popondopolo IO. Acute kidney injury in COVID-19 patients. Ulyanovsk Medico-Biological Journal. 2022;(4):49–57. (In Russ.) DOI: 10.34014/2227-1848-2022-4-49-57.</mixed-citation><mixed-citation xml:lang="ru">Cакаева Э.Р., Шутов А.М., Ефремова Е.В., Попондополо И.О. Острое повреждение почек у пациентов с СOVID-19. Ульяновский медико-биологический журнал. 2022;(4):49–57. DOI: 10.34014/2227-1848-2022-4-49-57.</mixed-citation></citation-alternatives></ref><ref id="B18"><label>18.</label><mixed-citation>Long E, Oakley E, Duke T, Babl FE. Paediatric Research in Emergency Departments International Collaborative (PREDICT). Does respiratory variation in inferior vena cava diameter predict fluid responsiveness: A systematic review and meta-analysis. Shock. 2017;47(5):550–559.</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>Adewumi AA, Braimoh KT, Adesiyun MOA, Ololu-Zubair HT, Idowu BM. Correlation of sonographic inferior vena cava and aorta diameter ratio with dehydration in Nigerian children. Niger J Clin Pract. 2019;22(7):950–956. DOI: 10.4103/njcp.njcp_591_18.</mixed-citation></ref><ref id="B20"><label>20.</label><mixed-citation>Lukaski HC, Diaz NV, Talluri A, Nescolarde L. Classification of hydration in clinical conditions: Indirect and direct approaches using bioimpedance. Nutrients. 2019;11(4):809. DOI: 10.3390/nu11040809.</mixed-citation></ref><ref id="B21"><label>21.</label><mixed-citation>Khajuria A, Krahn J. Osmolality revisited — deriving and validating the best formula for calculated osmolality. Clin Biochem. 2005;38:514–519. DOI: 10.1016/j.clinbiochem.2005.03.001.</mixed-citation></ref><ref id="B22"><label>22.</label><mixed-citation>Volkert D, Beck AM, Cederholm T, Cruz-Jentoft A, Hooper L, Kiesswetter E, Maggio M, Raynaud-Simon A, Sieber C, Sobotka L, van Asselt D, Wirth R, Bischoff SC. ESPEN practical guideline: Clinical nutrition and hydration in geriatrics. Clin Nutr. 2022;41:958–989. DOI: 10.1016/j.clnu.2022.01.024.</mixed-citation></ref><ref id="B23"><label>23.</label><citation-alternatives><mixed-citation xml:lang="en">Interim guidelines of the Ministry of Health of the Russian Federation “Prevention, diagnosis and treatment of a new coronavirus infection (COVID-19)”. Version 4 (03/27/2020). (In Russ.) http://nasci.ru/?id=10549 (access date: 07.07.2023).</mixed-citation><mixed-citation xml:lang="ru">Временные методические рекомендации МЗ РФ "Профилактика, диагностика и лечение новой коронавирусной инфекции (COVID-19)". Версия 4 (27.03.2020). http://nasci.ru/?id=10549. (дата обращения: 07.07.2023).</mixed-citation></citation-alternatives></ref><ref id="B24"><label>24.</label><mixed-citation>Manoeuvrier G, Bach-Ngohou K, Batard E, Masson D, Trewick D. Diagnostic performance of serum blood urea nitrogen to creatinine ratio for distinguishing prerenal from intrinsic acute kidney injury in the emergency department. BMC Nephrol. 2017;18:173. DOI: 10.1186/s12882-017-0591-9.</mixed-citation></ref><ref id="B25"><label>25.</label><mixed-citation>Uchino S, Bellomo R, Goldsmith D. The meaning of the blood urea nitrogen/creatinine ratio in acute kidney injury. Clin Kidney J. 2012;5(2):187–191. DOI: 10.1093/ckj/sfs013.</mixed-citation></ref><ref id="B26"><label>26.</label><mixed-citation>Hooper L, Abdelhamid A, Ali A, Bunn DK, Jennings A, John G, Kerry S, Lindner G, Pfortmueller CA, Sjöstrand F, Walsh NP, Fairweather-Tait SJ, Potter JF, Hunter PR, Shepstone L. Diagnostic accuracy of calculated serum osmolarity to predict dehydration in older people: Adding value to pathology lab reports. BMJ Open. 2015;5:e008846. DOI: 10.1136/bmjopen-2015-008846.</mixed-citation></ref><ref id="B27"><label>27.</label><mixed-citation>Yang X, Yiyang J, Ranran L. Prevalence and impact of acute renal impairment on COVID-19: A systematic review and meta-analysis. Crit Care. 2020;24(1):356. DOI: 10.1186/s13054-020-03065-4.</mixed-citation></ref><ref id="B28"><label>28.</label><mixed-citation>Hirsch JS, Ng JH, Ross DW, Sharma P, Shah HH, Barnett RL. Acute kidney injury in patients hospitalized with COVID-19. Kidney Int. 2020;98:209–218.</mixed-citation></ref><ref id="B29"><label>29.</label><mixed-citation>Pei G, Zhang Z, Peng J, Liu L, Zhang C, Yu C, Ma Z, Huang Y, Liu W, Yao Y, Zeng R, Xu G. Renal involvement and early prognosis in patients with COVID-19 pneumonia. J Am Soc Nephrol. 2020;31:1157–1165.</mixed-citation></ref><ref id="B30"><label>30.</label><mixed-citation>Santoriello D, Khairallah P, Bomback AS, Xu K. Postmortem kidney pathology findings in patients with COVID-19. JASN. 2020;31(9):2158–2167. DOI: 10.1681/ASN.2020050744.</mixed-citation></ref><ref id="B31"><label>31.</label><mixed-citation>Tarragon B, Valdenebro M, Serrano ML, Maroto A, Llopez-Carratala MR, Ramos A, Rubio E, Huerta A, Marques M, Portolés J. Acute kidney failure in patients admitted due to COVID-19. Nefrologia (Engl Ed). 2021;41(1):34–40. DOI: 10.1016/j.nefroe.2021.02.006.</mixed-citation></ref><ref id="B32"><label>32.</label><mixed-citation>Morita Y, Kurano M, Jubishi D, Ikeda M, Okamoto K, Tanaka M, Harada S, Okugawa S, Moriya K, Yatomi Y. Urine sediment findings were milder in patients with COVID-19-associated renal injuries than in those with non-COVID-19-associated renal injuries. Int J Infect Dis. 2022;117:302–311. DOI: 10.1016/j.ijid.2022.02.024.</mixed-citation></ref><ref id="B33"><label>33.</label><citation-alternatives><mixed-citation xml:lang="en">Molochkov AV, Karateev DE, Ogneva EY, Zulkarnaev AB, Luchikhina EL, Makarova IV, Semenov DYu. Comorbidities and predicting the outcome of COVID-19: the treatment results of 13,585 patients hospitalized in the Moscow Region. Almanac of Clinical Medicine. 2020;48(S1):1–10. (In Russ.) DOI: 10.18786/2072-0505-2020-48-040.</mixed-citation><mixed-citation xml:lang="ru">Молочков А.В., Каратеев Д.Е., Огнева Е.Ю., Зулькарнаев А.Б., Лучихина Е.Л., Макарова И.В., Семенов Д.Ю. Коморбидные заболевания и прогнозирование исхода COVID-19: результаты наблюдения 13 585 больных, находившихся на стационарном лечении в больницах Московской области. Альманах клинической медицины. 2020;48(S1):1–10. DOI: 10.18786/2072-0505-2020-48-040.</mixed-citation></citation-alternatives></ref><ref id="B34"><label>34.</label><citation-alternatives><mixed-citation xml:lang="en">Svarovskaya AV, Shabelsky AO, Levshin AV. Charlson comorbidity index in predicting deaths in COVID-19 patients. Russian Journal of Cardiology. 2022;27(3):4711. (In Russ.) DOI: 10.15829/1560-4071-2022-4711.</mixed-citation><mixed-citation xml:lang="ru">Сваровская А.В., Шабельский А.О., Левшин А.В. Индекс коморбидности Чарлсона в прогнозировании летальных исходов у пациентов с COVID-19. Российский кардиологический журнал. 2022;27(3):4711. DOI: 10.15829/1560-4071-2022-4711.</mixed-citation></citation-alternatives></ref><ref id="B35"><label>35.</label><mixed-citation>Nadim MK, Lui GF, Mehta RL, Connor MJ Jr, Liu KD, Ostermann M, Rimmelé T, Zarbock A. COVID-19-associated acute kidney injury: Consensus report of the 25th Acute Disease Quality Initiative (ADQI) Workgroup. Nat Rev Nephrol. 2020;16(12):747–764. DOI: 10.1038/s41581-020-00356-5.</mixed-citation></ref><ref id="B36"><label>36.</label><mixed-citation>Mohamed MMB, Lukitsch I, Torres-Ortiz AE, Walker JB, Varghese V, Hernandez-Arroyo CF, Alqudsi M, LeDoux JR, Velez JCQ. Acute Kidney Injury Associated with Coronavirus Disease 2019 in Urban New Orleans. Kidney360. 2020;1(7):614–622. DOI: 10.34067/KID.0002652020.</mixed-citation></ref></ref-list></back></article>
