- Poster presentation
- Open Access
Incidence of delirium in three critical care units of a teaching hospital in Brazil
Critical Care volume 15, Article number: P49 (2011)
Delirium is a disturbance of consciousness in which there is a sharply global deficit of attention associated with change in cognition that cannot be attributed to a pre-existing dementia. Its relevance is not only due to the high incidence, but above all its consequences, such as influence on mortality, morbidity, and prolonging the period of hospitalization.
The aim of this study was to assess the incidence of delirium in patients admitted to three intensive care units (ICUs) of a teaching hospital through the diagnostic tool CAM-ICU.
The patients were evaluated through the daily application of the CAM-ICU by the same physician. We evaluated the correlation of clinical suspicion of attending physicians, medical residents and nurses to perform the diagnosis of delirium compared with the CAM-ICU, the median time to development of delirium, and risk factors for developing delirium, and compared the outcome between patients who progressed to delirium and those who had no delirium during the study period. Standard descriptive statistics were used. Continuous variables were reported as the mean and standard deviation. Interobserver agreement was assessed using Cohen's kappa statistic (κ). All statistics and their 95% confidence intervals were computed using SPSS software and Medcalc software.
In the period of 39 days, 106 patients were screened, and 42 patients fulfilled inclusion criteria and were enrolled in the study. The incidence of delirium was 21.4% (nine patients). The average time to development of delirium was 62.67 hours (± 33.76), and 88.9% of patients developed delirium in the first 5 days in the ICU. The agreement of clinical diagnoses in relation to the CAM-ICU method was moderate, with the best agreement assigned to nurses. A trend for increased length of ICU and hospital stay was found between patients who developed delirium. The average time in the ICU for patients with delirium was 12.11 days (± 15.44) and patients without delirium was 5.75 days (± 7.13), P = 0.0821. The average time of hospitalization for patients with delirium was 29 days (± 28.99) and without delirium was 21.69 days (± 22.83), P = 0.428. See Table 1.
Delirium is a common disorder in ICUs. Specific tests should be used regularly in order to optimize the correct diagnosis and treatment of this disturbance.
Rights and permissions
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
About this article
Cite this article
Okada, A., Azevedo, R. & Machado, F. Incidence of delirium in three critical care units of a teaching hospital in Brazil. Crit Care 15 (Suppl 2), P49 (2011). https://doi.org/10.1186/cc10197
- Intensive Care Unit
- Teaching Hospital
- Critical Care
- Clinical Suspicion