Editing Normal pressure hydrocephalus (section)

==Epidemiology==
Approximately half of all cases are primary (or idiopathic) NPH.<ref name="ReferenceA"/> Incidence is estimated to 0.3–3% in patients older than 60 years; the percentage rises with older age.<ref>{{cite journal | vauthors = Jaraj D, Rabiei K, Marlow T, Jensen C, Skoog I, Wikkelsø C | title = Prevalence of idiopathic normal-pressure hydrocephalus | journal = Neurology | volume = 82 | issue = 16 | pages = 1449–54 | date = April 2014 | pmid = 24682964 | pmc = 4001197 | doi = 10.1212/WNL.0000000000000342 }}</ref> Its prevalence is reported to be less than 1% in persons under the age of 65, and up to 3% for persons aged 65 or older. No difference in incidence is seen between men and women or amongst differing ethnicities.<ref>{{Cite web |title=Normal Pressure Hydrocephalus (NPH): Symptoms & Treatment |url=https://my.clevelandclinic.org/health/diseases/15849-normal-pressure-hydrocephalus-nph |access-date=2024-01-22 |website=Cleveland Clinic |language=en}}</ref><ref name="younger">{{cite book | vauthors = Younger DS | date = 2005 | chapter = Adult Normal Pressure Hydrocephalus | veditors = Younger DS | title = Motor Disorders | edition = 2nd  | pages = 581–84 | location = Philadelphia, PA | publisher = Lippincott Williams & Wilkins }}</ref><ref name="pmid18205881">{{cite journal | vauthors = Brean A, Eide PK | title = Prevalence of probable idiopathic normal pressure hydrocephalus in a Norwegian population | journal = Acta Neurologica Scandinavica | volume = 118 | issue = 1 | pages = 48–53 | date = July 2008 | pmid = 18205881 | doi = 10.1111/j.1600-0404.2007.00982.x | hdl-access = free | hdl = 10852/27953 | s2cid = 25605575 }}</ref><ref name="pmid19096225">{{cite journal | vauthors = Tanaka N, Yamaguchi S, Ishikawa H, Ishii H, Meguro K | title = Prevalence of possible idiopathic normal-pressure hydrocephalus in Japan: the Osaki-Tajiri project | journal = Neuroepidemiology | volume = 32 | issue = 3 | pages = 171–5 | date = 1 January 2009 | pmid = 19096225 | doi = 10.1159/000186501 | s2cid = 39139263 }}</ref> Among individuals with [[dementia]], the incidence of NPH is thought to be between 2% and 6%.{{cn|date=April 2025}}