title: Sleep patterns as a predictor for length of stay in a psychiatric intensive care unit.
abstract: Systematic evaluations of the relationship between sleep patterns and length of stay in psychiatric intensive care units (PICUs) are lacking. The aims of the present study were to explore if sleep duration or night-to-night variations in sleep duration the first nights predict length of stay in a PICU. Consecutive patients admitted to a PICU were included (N=135) and the nurses registered the time patients were observed sleeping. In the three first nights, the mean sleep duration was 7.5 (±3.2)h. Sleep duration the first night correlated negatively with the length of stay for patients with schizophrenia. The mean difference in sleep duration from night one to night two were 3.3 (±3.0)h and correlated with length of stay for the whole group of patients, but especially for patients with schizophrenia. Patients of all diagnostic groups admitted to a PICU had pronounced intra-individual night-to-night variations in sleep duration. Stabilizing night-to-night variations of sleep duration might be a major goal in treatment.
authors.affiliation: Department of Psychiatry, St Olavs University Hospital, Trondheim, Norway; Department of Neuroscience, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway. Electronic address: knut.langsrud@ntnu.no.
authors.forename: Knut
authors.initials: K
authors.lastname: Langsrud
authors.affiliation: Department of Psychiatry, St Olavs University Hospital, Trondheim, Norway; Department of Neuroscience, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
authors.forename: Arne E
authors.initials: AE
authors.lastname: Vaaler
authors.affiliation: Department of Psychiatry, St Olavs University Hospital, Trondheim, Norway; Department of Neuroscience, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
authors.forename: Håvard
authors.initials: H
authors.lastname: Kallestad
authors.affiliation: Department of Psychiatry, St Olavs University Hospital, Trondheim, Norway; Department of Neuroscience, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
authors.forename: Gunnar
authors.initials: G
authors.lastname: Morken
mesh_terms: D000328:Adult; D005260:Female; D006760:Hospitalization / Q000639:trends; D006801:Humans; D007362:Intensive Care Units / Q000639:trends*; D007902:Length of Stay / Q000639:trends*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011567:Psychiatric Department, Hospital / Q000639:trends*; D012559:Schizophrenia / Q000175:diagnosis / Q000503:physiopathology; D012890:Sleep / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology
keywords: Acute disease; Hospitalization; Inpatients; Psychiatry; Sleep