Hyponatremia is the most common type of [[electrolyte imbalance]], and is often found in older adults.<ref>{{Cite journal|last1=Valle|first1=Jana M.|last2=Beveridge|first2=Alexander|last3=Chróinín|first3=Danielle Ní|date=2022-02-16|title=Exploring hyponatremia in older hospital in-patients: management, association with falls, and other adverse outcomes|url=https://www.sciencedirect.com/science/article/pii/S2667032122000075|journal=Aging and Health Research|volume=2|language=en|pages=100060|doi=10.1016/j.ahr.2022.100060|s2cid=246938773|issn=2667-0321|doi-access=free}}</ref><ref name=Din2017>{{cite journal|last1=Dineen|first1=R|last2=Thompson|first2=CJ|last3=Sherlock|first3=M|title=Hyponatraemia – presentations and management.|journal=Clinical Medicine|date=June 2017|volume=17|issue=3|pages=263–69|doi=10.7861/clinmedicine.17-3-263|pmid=28572229|pmc=6297575}}</ref> It occurs in about 20% of those admitted to hospital and 10% of people during or after an [[endurance sport]]ing event.<ref name=Ann2015/><ref name=Fil2016/> Among those in hospital, hyponatremia is associated with an increased risk of death.<ref name=Fil2016>{{cite journal |last1=Filippatos |first1=TD |last2=Liamis |first2=G |last3= Christopoulou |first3=F |last4=Elisaf |first4=MS |title= Ten common pitfalls in the evaluation of patients with hyponatremia.|journal=European Journal of Internal Medicine|date=April 2016 |volume=29 |pages=22–25 |pmid= 26706473 |doi=10.1016/j.ejim.2015.11.022|doi-access=free }}</ref> The economic costs of hyponatremia are estimated at $2.6 billion per annum in the United States.<ref>{{cite book |last1=Simon |first1=Eric E. |title=Hyponatremia: Evaluation and Treatment |date=2014 |publisher=Springer Science & Business Media |isbn=978-1461466451 |page=205 |url=https://books.google.com/books?id=Sd69BAAAQBAJ&pg=PA205 |language=en |url-status=live |archive-url=https://web.archive.org/web/20160815225038/https://books.google.ca/books?id=Sd69BAAAQBAJ&pg=PA205 |archive-date=2016-08-15 }}</ref>
