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Critical Care
Published in: Critical Care 1/2013

01-02-2013 | Letter

An expected association between low haemoglobin and poor outcome in severe head injury and an insufficiently detailed multivariate analysis

Author: Kieran Donnelly

Published in: Critical Care | Issue 1/2013

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Excerpt

I read with interest the paper by Sekhon and colleagues, 'Association of hemoglobin concentration in critically ill patients with severe traumatic brain injury' (July edition of Critical Care) [1]. Whilst the conclusion ('mean 7-day haemoglobin concentration < 90 g/L associated with increased hospital mortality in patients with severe traumatic brain injury') is striking, it is plausible, if not likely, that both the haemoglobin deficit and the observed mortality are dependent upon the severity of the initial injury, and therefore an association between these two might be expected. …
Literature
1.
Sekhon MS, McLean N, Henderson WR, Chittock DR, Griesdale DE: Association of hemoglobin concentration and mortality in critically ill patients with severe traumatic brain injury. Crit Care 2012, 16: R128. 10.1186/cc11431PubMedCentralCrossRefPubMed
2.
3.
Perel P, Arango M, Clayton T, Edwards P, Komolafe E, Poccock S, Roberts I, Shakur H, Steyerberg E, Yutthakasemsunt S: Predicting outcome after traumatic brain injury: practical prognostic models based on large cohort of international patients. BMJ 2008, 336: 425-429.CrossRefPubMed
4.
Salim A, Hadjizacharia P, DuBose J, Brown C, Inaba K, Chan L, Margulies DR: Role of anemia in traumatic brain injury. J Am Coll Surg 2008, 207: 398-406. 10.1016/j.jamcollsurg.2008.03.013CrossRefPubMed
5.
Carlson AP, Schermer CR, Lu SW: Retrospective evaluation of anemia and transfusion in traumatic brain injury. J Trauma 2006, 61: 567-571. 10.1097/01.ta.0000231768.44727.a2CrossRefPubMed
6.
Griesdale DEG, McEwen J, Kurth T, Chittock DR: External ventricular drains and mortality in patients with severe traumatic brain injury. Can J Neurol Sci 2010, 37: 43-48.CrossRefPubMed
7.
Vittinghoff E, McCulloch CE: Relaxing the rule of ten events per variable in logistic and Cox regression. Am J Epidemiol 2007, 165: 710-718. 10.1093/aje/kwk052CrossRefPubMed
Metadata
Title
An expected association between low haemoglobin and poor outcome in severe head injury and an insufficiently detailed multivariate analysis
Author
Kieran Donnelly
Publication date
01-02-2013
Publisher
BioMed Central
Published in
Critical Care / Issue 1/2013
Electronic ISSN: 1364-8535
DOI
https://doi.org/10.1186/cc11879

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