{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T20:28:52Z","timestamp":1785529732188,"version":"3.56.0"},"reference-count":45,"publisher":"The Endocrine Society","issue":"6","license":[{"start":{"date-parts":[[2021,2,24]],"date-time":"2021-02-24T00:00:00Z","timestamp":1614124800000},"content-version":"vor","delay-in-days":1,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,5,13]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Context<\/jats:title>\n                  <jats:p>Dysnatremia is an independent predictor of mortality in patients with bacterial pneumonia. There is paucity of data about the incidence and prognostic impact of abnormal sodium concentration in patients with coronavirus disease 2019 (COVID-19).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Objective<\/jats:title>\n                  <jats:p>This work aimed to examine the association of serum sodium during hospitalization with key clinical outcomes, including mortality, need for advanced respiratory support and acute kidney injury (AKI), and to explore the role of serum sodium as a marker of inflammatory response in COVID-19.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>This retrospective longitudinal cohort study, including all adult patients who presented with COVID-19 to 2 hospitals in London over an 8-week period, evaluated the association of dysnatremia (serum sodium\u2005&amp;lt;\u2005135 or &amp;gt;\u2005145 mmol\/L, hyponatremia, and hypernatremia, respectively) at several time points with inpatient mortality, need for advanced ventilatory support, and AKI.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>The study included 488 patients (median age, 68 years). At presentation, 24.6% of patients were hyponatremic, mainly due to hypovolemia, and 5.3% hypernatremic. Hypernatremia 2 days after admission and exposure to hypernatremia at any time point during hospitalization were associated with a 2.34-fold (95% CI, 1.08-5.05; P\u2005=\u2005.0014) and 3.05-fold (95% CI, 1.69-5.49; P\u2005&amp;lt;\u2005.0001) increased risk of death, respectively, compared to normonatremia. Hyponatremia at admission was linked with a 2.18-fold increase in the likelihood of needing ventilatory support (95% CI, 1.34-3.45, P\u2005=\u2005.0011). Hyponatremia was not a risk factor for in-hospital mortality, except for the subgroup of patients with hypovolemic hyponatremia. Sodium values were not associated with the risk for AKI and length of hospital stay.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>Abnormal sodium levels during hospitalization are risk factors for poor prognosis, with hypernatremia and hyponatremia being associated with a greater risk of death and respiratory failure, respectively. Serum sodium values could be used for risk stratification in patients with COVID-19.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1210\/clinem\/dgab107","type":"journal-article","created":{"date-parts":[[2021,2,24]],"date-time":"2021-02-24T04:51:58Z","timestamp":1614142318000},"page":"1637-1648","source":"Crossref","is-referenced-by-count":88,"title":["Dysnatremia is a Predictor for Morbidity and Mortality in Hospitalized Patients with COVID-19"],"prefix":"10.1210","volume":"106","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4228-071X","authenticated-orcid":false,"given":"Ploutarchos","family":"Tzoulis","sequence":"first","affiliation":[{"name":"Department of Metabolism & Experimental Therapeutics, Division of Medicine, University College London, London, UK"},{"name":"Department of Endocrinology & Diabetes, Whittington Health NHS Trust, London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julian A","family":"Waung","sequence":"additional","affiliation":[{"name":"Department of Endocrinology & Diabetes, Whittington Health NHS Trust, London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emmanouil","family":"Bagkeris","sequence":"additional","affiliation":[{"name":"National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ziad","family":"Hussein","sequence":"additional","affiliation":[{"name":"Department of Diabetes\u2005&\u2005Endocrinology, University College London Hospital NHS Foundation Trust, London, UK"},{"name":"Division of Medicine, University College London, London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aiyappa","family":"Biddanda","sequence":"additional","affiliation":[{"name":"Department of Endocrinology & Diabetes, Whittington Health NHS Trust, London, 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