title: An epidemiological study on hyponatremia in psychiatric patients in mental hospitals in Nara Prefecture.
abstract: Hyponatremia occurs often in mental illness. The frequency was not noticed because of the uncharacteristic symptoms of mild hyponatremia. Of the 1,114 psychiatric inpatients retrospectively surveyed, 10.5% had hyponatremia. Not only patients with schizophrenia, but also patients with other mental illness, especially with epilepsy, having hyponatremia were confirmed. An early onset, a long duration of psychiatric disorder and a prolonged admission were statistically significant factors. Nicotine abuse was not a significant factor. It was suggested that the pathogenesis of hyponatremia in psychiatric patients might be involved in a chronic course of psychiatric disorders and poor response to psychopharmacotherapy.
authors.affiliation: Department of Psychiatry, Nara Medical University, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Ohsawa
authors.forename: T
authors.initials: T
authors.lastname: Kishimoto
authors.forename: M
authors.initials: M
authors.lastname: Hirai
authors.forename: N
authors.initials: N
authors.lastname: Shimayoshi
authors.forename: K
authors.initials: K
authors.lastname: Matsumura
authors.forename: H
authors.initials: H
authors.lastname: Oribe
authors.forename: F
authors.initials: F
authors.lastname: Hirao
authors.forename: G
authors.initials: G
authors.lastname: Ikawa
authors.forename: T
authors.initials: T
authors.lastname: Nakai
authors.forename: M
authors.initials: M
authors.lastname: Miyake
mesh_terms: D000328:Adult; D005260:Female; D006778:Hospitals, Psychiatric; D006801:Humans; D007010:Hyponatremia / Q000097:blood / Q000150:complications / Q000453:epidemiology*; D007564:Japan / Q000453:epidemiology; D008297:Male; D001523:Mental Disorders / Q000150:complications*; D008875:Middle Aged; D015995:Prevalence; D012189:Retrospective Studies; D012964:Sodium / Q000097:blood; D013997:Time Factors
chemical_list: D012964:Sodium