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01-12-2012 | Original

Associations of markers of inflammation and coagulation with delirium during critical illness

Authors: Timothy D. Girard, Lorraine B. Ware, Gordon R. Bernard, Pratik P. Pandharipande, Jennifer L. Thompson, Ayumi K. Shintani, James C. Jackson, Robert S. Dittus, E. Wesley Ely

Published in: Intensive Care Medicine | Issue 12/2012

Abstract

Purpose

To assess the associations between a priori-selected markers of inflammation and coagulation and delirium during critical illness.

Methods

In this prospective cohort study, we collected blood from mechanically ventilated medical intensive care unit (ICU) patients and measured nine plasma markers of inflammation and coagulation. We assessed patients daily for delirium using the Confusion Assessment Method for the ICU and used multivariable regression to analyze the associations between plasma markers and subsequent delirium, after adjusting for age, severity of illness, and sepsis.

Results

Among the 138 patients studied, with median age of 66 years and median Acute Physiology and Chronic Health Evaluation (APACHE) II of 27, 107 (78 %) were delirious at some point during the study. Two markers of inflammation and one of coagulation were significantly associated with delirium. After adjusting for covariates, lower plasma concentrations of matrix metalloproteinase-9 (MMP-9) and protein C were associated with increased probability of delirium (p = 0.04 and 0.01, respectively), and higher concentrations of soluble tumor necrosis factor receptor-1 (sTNFR1) were associated with increased probability of delirium (p < 0.01). Concentrations of C-reactive protein (p = 0.82), myeloperoxidase (p = 0.11), neutrophil gelatinase-associated lipocalin (p = 0.70), D-dimer (p = 0.83), plasminogen activator inhibitor type 1 (p = 0.98), and Von Willebrand factor antigen (p = 0.65) were not associated with delirium.

Conclusions

In this study, MMP-9, protein C, and sTNFR1 were independently associated with subsequent ICU delirium. These results suggest that specific aspects of inflammation and coagulation may play a role in the evolution of delirium during critical illness and that these markers should be examined in larger studies of ICU patients.

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Title: Associations of markers of inflammation and coagulation with delirium during critical illness
Authors: Timothy D. Girard
Lorraine B. Ware
Gordon R. Bernard
Pratik P. Pandharipande
Jennifer L. Thompson
Ayumi K. Shintani
James C. Jackson
Robert S. Dittus
E. Wesley Ely
Publication date: 01-12-2012
Publisher: Springer-Verlag
Published in: Intensive Care Medicine / Issue 12/2012
Print ISSN: 0342-4642
Electronic ISSN: 1432-1238
DOI: https://doi.org/10.1007/s00134-012-2678-x

At a glance: The STEP trials

Springer Medicine

Associations of markers of inflammation and coagulation with delirium during critical illness

Abstract

Purpose

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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