Related Experiment Video
Updated: Mar 26, 2026

Author Spotlight: Unveiling the Connection Between Sleep Disorders and Cognitive Symptoms in Depression
Published on: April 26, 2024
Sleep patterns as a predictor for length of stay in a psychiatric intensive care unit
Knut Langsrud1, Arne E Vaaler1, Håvard Kallestad1
1Department of Psychiatry, St Olavs University Hospital, Trondheim, Norway; Department of Neuroscience, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
Insights
Sleep duration and its variations in the first nights of psychiatric intensive care units (PICUs) predict patient length of stay. Stabilizing sleep patterns may improve outcomes for PICU patients.
Area of Science:
- Psychiatry
- Sleep Medicine
- Critical Care
Background:
- Limited research exists on the relationship between sleep patterns and length of stay in psychiatric intensive care units (PICUs).
- Understanding sleep's role is crucial for optimizing patient recovery and resource management in acute psychiatric settings.
Purpose of the Study:
- To investigate if sleep duration and night-to-night sleep duration variability during the initial nights in a PICU predict the length of stay.
- To identify specific sleep parameters that may serve as indicators for prolonged hospitalization in psychiatric care.
Main Methods:
- A cohort of 135 consecutive patients admitted to a PICU was studied.
- Nurses systematically recorded observed sleep duration for the first three nights.
- Statistical analyses were performed to correlate sleep duration and variability with length of stay.
Main Results:
- Mean sleep duration in the first three nights was 7.5 (±3.2) hours.
- First-night sleep duration negatively correlated with length of stay in patients with schizophrenia.
- Night-to-night sleep duration differences (mean 3.3 ±3.0 hours) correlated with length of stay for all patients, particularly those with schizophrenia.
Conclusions:
- Significant intra-individual variations in sleep duration were observed across all diagnostic groups in the PICU.
- Addressing and stabilizing night-to-night sleep variations could be a key therapeutic target to potentially reduce length of stay.
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.
Related Concept Videos
Substance Use Disorders Affecting Sleep
Understanding the concepts of physical dependence,...
Sleep-Wake Cycles
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
Stages of Sleep
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
Management of Insomnia
Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...

