Cited by 611Intensive Care Unit Cognitive DisordersAlcoholism and Thiamine DeficiencyAnesthesia and Sedative Agents

Delirium in an intensive care unit: a study of risk factors

Dubois, Marc-Jacques, Bergeron, Nicolas, Dumont, Marc, Dial, Sandra, Skrobik, Yoanna·2001·Intensive Care Medicine

Abstract

Objectives (1) To establish risk factors for the development of delirium in an intensive care unit (ICU) and (2) to determine the effect of delirium on morbidity, mortality and length of stay.Design Prospective study.Setting Sixteen-bed medical/surgical ICU in a university hospital.Patients Two hundred and sixteen consecutive patients admitted to the ICU for more than 24 h during 5 months were included in the study.Interventions Medical history, selected laboratory values, drugs received and factors that may influence patient psychological and emotional well-being were noted. All patients were screened with a delirium scale. A psychiatrist confirmed the diagnosis of delirium. Major complications such as self-extubation and removal of catheters, as well as mortality and length of stay were recorded.Results Forty patients (19%) developed delirium; of these, one-third were not agitated. In the multivariate analysis hypertension, smoking history, abnormal bilirubin level, epidural use and morphine were statistically significantly associated with delirium. Traditional factors associated with the development of delirium on general ward patients were not significant in our study. Morbidity (self-extubation and removal of catheters), but not mortality, was clearly increased.Conclusion Predictive risk factors for the development of delirium in studies outside the ICU may not be applicable to critically ill patients. Delirium is associated with increased morbidity. Awareness of patients at risk may lead to better recognition and earlier intervention.

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Crossref · 10.1007/s001340101017

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  • Delirium and agitation in critically ill patients are associated with increased morbidity and risk of mortality.

    “Behavioral disorders such as delirium and agitation in the critically ill occur with a high frequency, ranging from 15% to 80% of patients, and have been associated with increased morbidity and risk of mortality [7-13].”
  • Few data exist regarding the behavioral impact of sudden nicotine abstinence in the ICU setting, except one study that identified smoking history as a risk factor for delirium in critically ill patients.

    “Few data exist in the literature regarding the behavioral impact of sudden nicotine abstinence in the ICU setting, except for one study, which identified smoking history as a risk factor for delirium in critically ill patients [8].”
  • Delirium and agitation occur frequently in critically ill patients, with reported frequencies of 15% to 80%.

    “Behavioral disorders such as delirium and agitation in the critically ill occur with a high frequency, ranging from 15% to 80% of patients, and have been associated with increased morbidity and risk of mortality [7-13].”
  • We found no association between nicotine withdrawal and delirium.

    “In contrast to the finding of Dubois and colleagues [8], we found no association between nicotine withdrawal and delirium.”
  • The incidence of delirium recorded in our study was 28%, at the low level of the range cited in the literature (13% to 70%).

    “The 28% incidence of delirium we recorded at the low level of the wide range cited in the literature (13% to 70%) [8,11,38-40].”

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Authors
Dubois, M.-J., Bergeron, N., Dumont, M., Dial, S., & Skrobik, Y.
Affiliations
  • Université de Montréal (CA)
  • McGill University (CA)
Corresponding author
Skrobik, Yoanna
Venue
Intensive Care Medicine
Published
2001-07-17
Volume
27
Issue
8
Pages
1297-1304
ISSN
  • 0342-4642 (ISSN-L)
  • 1432-1238
OpenAlex
W2067617465
Cited by
609
References
0
Citations by year
2026: 7 · 2025: 10 · 2024: 10 · 2023: 17 · 2022: 17 · 2021: 33 · 2020: 26 · 2019: 18 · 2018: 33 · 2017: 29 · 2016: 22 · 2015: 30 · 2014: 28 · 2013: 41 · 2012: 53
FWCI
10.38
Type
journal article
Language
en
Open access
closed
Locations
  • Intensive Care Medicine (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Critical Care and Intensive Care Medicine › Intensive Care Unit Cognitive Disorders
  • Health Sciences › Medicine › Neurology › Alcoholism and Thiamine Deficiency
  • Health Sciences › Medicine › Anesthesiology and Pain Medicine › Anesthesia and Sedative Agents
Keywords
delirium, intensive care unit, risk factors, critically ill patients, hypertension, smoking history, hyperbilirubinemia, epidural analgesia, morphine, self-extubation, catheter removal, morbidity, mortality, length of hospital stay, delirium screening
MeSH terms
Analysis of Variance, Delirium, Female, Humans, Intensive Care Units, Length of Stay, Male, Middle Aged, Prospective Studies, Quebec, Risk Factors, Multivariate Analysis, Logistic Models, Odds Ratio

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