Evidence map›Paper›PMID 22896030›Full record

ArticleBMJ (Clinical research ed.)2012

Predicting early death in patients with traumatic bleeding: development and validation of prognostic model.

Pablo Perel, David Prieto-Merino, Haleema Shakur, Tim Clayton, Fiona Lecky, Omar Bouamra, Rob Russell, Mark Faulkner, Ewout W Steyerberg, Ian Roberts

Abstract readValidation Study
In one paragraph

Article in BMJ (Clinical research ed.), 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 4 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

36 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Pablo PerelClinical Trials Unit, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK. pablo.perel@lshtm.ac.uk
David Prieto-Merino
Haleema Shakur
Tim Clayton
Fiona Lecky
Omar Bouamra
Rob Russell
Mark Faulkner
Ewout W Steyerberg
Ian Roberts

Funding

Department of Health 09/22/165Medical Research Council G0902393Medical Research Council G0902393/99558Medical Research Council MR/K006584/1
6 · The paper itself

Abstract

objectiveTo develop and validate a prognostic model for early death in patients with traumatic bleeding.

designMultivariable logistic regression of a large international cohort of trauma patients.

setting274 hospitals in 40 high, medium, and low income countries

participantsPrognostic model development: 20,127 trauma patients with, or at risk of, significant bleeding, within 8 hours of injury in the Clinical Randomisation of an Antifibrinolytic in Significant Haemorrhage (CRASH-2) trial. External validation: 14,220 selected trauma patients from the Trauma Audit and Research Network (TARN), which included mainly patients from the UK. OUTCOMES: In-hospital death within 4 weeks of injury.

results3076 (15%) patients died in the CRASH-2 trial and 1765 (12%) in the TARN dataset. Glasgow coma score, age, and systolic blood pressure were the strongest predictors of mortality. Other predictors included in the final model were geographical region (low, middle, or high income country), heart rate, time since injury, and type of injury. Discrimination and calibration were satisfactory, with C statistics above 0.80 in both CRASH-2 and TARN. A simple chart was constructed to readily provide the probability of death at the point of care, and a web based calculator is available for a more detailed risk assessment (http://crash2.lshtm.ac.uk).

conclusionsThis prognostic model can be used to obtain valid predictions of mortality in patients with traumatic bleeding, assisting in triage and potentially shortening the time to diagnostic and lifesaving procedures (such as imaging, surgery, and tranexamic acid). Age is an important prognostic factor, and this is of particular relevance in high income countries with an aging trauma population.

Indexed as

AdultBlood PressureCause of DeathClinical Trials as TopicDeath, SuddenFemaleGlasgow Coma ScaleHemorrhageHumansLogistic ModelsMaleMiddle AgedModels, StatisticalPrognosisRisk AssessmentWounds and Injuries

Identifiers

PMID22896030
PMCPMC3419468

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