Trial reportBMJ open respiratory research2020
Is there an association between subjective sleep quality and daily delirium occurrence in critically ill adults? A post hoc analysis of a randomised controlled trial.
Trial report in BMJ open respiratory research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT01791296 (The Effect of a Dexmedetomidine-focussed Sleep Protocol* on Delirium Incidence and Healthcare Costs in Critically Ill Patients), which is not on this map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
The Effect of a Dexmedetomidine-focussed Sleep Protocol* on Delirium Incidence and Healthcare Costs in Critically Ill Patients: A Prospective Randomized, Double-blind, Pilot Study.
Who cites it
4 citing papers in PubMed.
- Sleep Quality and Delirium Occurrence in Intensive Care Unit Patients: A Prospective Observational Study.Nursing in critical care · 2026Observational
- Association Between Preoperative Sleep Disturbance and Postoperative Delirium in Adults Undergoing Elective Surgery.Cureus · 2025Article
- Characterization of Nocturnal Neuroactive Medication Use and Related Sleep Documentation in Critically Ill Adults.Critical care explorations · 2021Article
- Sleep, circadian rhythms and outcomes in intensive care unit.Frontiers in neurologyReview
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors.
Funding
Abstract
objectivesWhether and how delirium and sleep quality in the intensive care unit (ICU) are linked remains unclear. A recent randomised trial reported nocturnal low-dose dexmedetomidine (DEX) significantly reduces incident ICU delirium. Leeds Sleep Evaluation Questionnaire (LSEQ) scores were similar between intervention (DEX; n=50) and control (placebo (PLA); n=50) groups. We measured the association between morning LSEQ and delirium occurrence in the prior 24 hours (retrospective analysis) and the association between morning LSEQ and delirium occurrence in the following 24 hours (predictive analysis).
designPost hoc analysis of randomised controlled trial data.
participantsAdult ICU patients (n=100) underwent delirium screening twice a day using the Intensive Care Delirium Screening Checklist (ICDSC) if Richmond Agitation Sedation Scale (RASS) was ≥-3 and patient-reported sleep quality evaluations at 09:00 daily with the LSEQ if RASS was ≥-1. OUTCOMES: The analysis included all 24-hour study periods with LSEQ documentation and matched delirium screening in coma-free patients. Separate logistic regression models controlling for age, baseline Acute Physiology and Chronic Health Evaluation II score and DEX/PLA allocation evaluated the association between morning LSEQ and delirium occurrence for both retrospective and predictive analyses.
resultsThe 100 patients spent 1115 24-hour periods in the ICU. Coma, delirium and no delirium occurred in 130 (11.7%), 114 (10.2%) and 871 (78.1%), respectively. In the retrospective analysis, when an LSEQ result was preceded by an ICDSC result (439/985 (44.6%) 24-hour periods), delirium occurred during 41/439 (9.3%) periods. On regression analysis, the LSEQ score had no relationship to prior delirium occurrence (OR (per every 1 point average LSEQ change) 0.97, 95% CI 0.72 to 1.31). For the predictive analysis, among the 387/985 (39.1%) 24-hour periods where an LSEQ result was followed by an ICDSC result, delirium occurred during 56/387 (14.5%) periods. On regression analysis, the LSEQ score did not predict subsequent delirium occurrence (OR (per 1 point LSEQ change) 1.02, 95% CI 0.99 to 1.05).
conclusionsThe sleep quality ICU patients perceive neither affects nor predicts delirium occurrence. TRIAL REGISTRATION NUMBER: NCT01791296.
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