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Mechanism, glasgow coma scale, age, and arterial pressure (MGAP): a new simple prehospital triage score to predict mortality in trauma patients

Le Manach, Yannick
David, Jean-Stephane
Rancurel, Elisabeth
Smail, Nadia
Thicoipe, Michel
Wiel, Eric
Ricard-Hibon, Agnes
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Published in Critical Care Medicine. 2010, vol. 38, no. 3, p. 831-837
Abstract OBJECTIVES: Prehospital triage of trauma patients is of paramount importance because adequate trauma center referral improves survival. We developed a simple score that is easy to calculate in the prehospital phase. DESIGN: Multicenter prospective observational study. SETTING: Prehospital physician-staffed emergency system in university and nonuniversity hospitals. INTERVENTIONS: We evaluated 1360 trauma patients receiving care from a prehospital mobile intensive care unit in 22 centers in France during 2002. The association of prehospital variables with in-hospital death was tested using logistic regression, and a simple score (the Mechanism, Glasgow coma scale, Age, and Arterial Pressure [MGAP] score) was created and compared with the triage Revised Trauma Score, Revised Trauma Score, and Trauma Related Injury Severity Score. The model was validated in 1003 patients from 2003 through 2005. MEASUREMENTS AND MAIN RESULTS: Four independent variables were identified, and each was assigned a number of points proportional to its regression coefficient to provide the MGAP score: Glasgow Coma Scale (from 3-15 points), blunt trauma (4 points), systolic arterial blood pressure (>120 mm Hg: 5 points, 60 to 120 mm Hg: 3 points), and age <60 yrs (5 points). The area under the receiver operating characteristic curve of MGAP was not significantly different from that of the triage Revised Trauma Score or Revised Trauma Score, but when sensitivity was fixed >0.95 (undertriage of 0.05), the MGAP score was more specific and accurate than triage Revised Trauma Score and Revised Trauma Score, approaching those of Trauma Related Injury Severity Score. We defined three risk groups: low (23-29 points), intermediate (18-22 points), and high risk (<18 points). In the derivation cohort, the mortality was 2.8%, 15%, and 48%, respectively. Comparable characteristics of the MGAP score were observed in the validation cohort. CONCLUSION: The MGAP score can accurately predict in-hospital death in trauma patients.
Keywords AdultBlood Pressure/*physiologyCohort StudiesEmergency Medical Services/*methodsFemaleFranceGlasgow Coma Scale/*statistics & numerical dataHospital MortalityHumansMaleMiddle AgedPrognosisReferral and ConsultationReproducibility of ResultsRisk FactorsTrauma CentersTrauma Severity IndicesTriage/*methodsWounds and Injuries/*mortality/*physiopathologyYoung Adult
PMID: 20068467
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SARTORIUS, Danielle Marie et al. Mechanism, glasgow coma scale, age, and arterial pressure (MGAP): a new simple prehospital triage score to predict mortality in trauma patients. In: Critical Care Medicine, 2010, vol. 38, n° 3, p. 831-837. https://archive-ouverte.unige.ch/unige:21289

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Deposited on : 2012-05-23

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