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

Abstract

OBJECTIVE:

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

DESIGN:

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

SETTING:

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

PARTICIPANTS:

Prognostic 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.

RESULTS:

3076 (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).

CONCLUSIONS:

This 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.

• Authors: Pablo Perel, David Prieto-Merino, Haleema Shakur, Tim Clayton, Fiona Lecky, Omar Bouamra, Rob Russell, Mark Faulkner, Ewout W Steyerberg, Ian Roberts
• Journal: BMJ (Clinical research ed.) (BMJ) Vol. 345 Pg. e5166 (Aug 15 2012) ISSN: 1756-1833 [Electronic] England
• PMID: 22896030 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Validation Study)

Topics

• Adult
• Blood Pressure (physiology)
• Cause of Death
• Clinical Trials as Topic
• Death, Sudden (epidemiology)
• Female
• Glasgow Coma Scale
• Hemorrhage (mortality, physiopathology)
• Humans
• Logistic Models
• Male
• Middle Aged
• Models, Statistical
• Prognosis
• Risk Assessment
• Wounds and Injuries (mortality, physiopathology)