title: A new "TRISS-like" probability of survival model for intubated trauma patients.
abstract: BACKGROUND
  Prehospital trauma patient field intubations and paralyzations, using neuromuscular blocking agents before emergency department respiratory and neurologic assessments are made, bias assessments and outcome evaluations using probability-of-survival models, such as TRISS and A Severity Characterization of Trauma (ASCOT). We present a newly developed "TRISS-like" probability-of-survival model for intubated blunt- and penetrating-injured patient assessment.
  
  
  METHODS
  From a population of 51397 consecutively admitted trauma patients, this study used all 5740 (11.2% of the total injured population) intubated patients with complete data from a statewide trauma registry from October 1, 1993, to September 30, 1996. Model performance was evaluated using standard calibration and discrimination measures and z and W statistics of significance.
  
  
  RESULTS
  The new model accurately predicted survival for blunt- and penetrating-injured intubated patients and is applicable to 11 etiologic patient populations.
  
  
  CONCLUSIONS
  Study findings suggest that the new TRISS-like model should be used to assess both blunt- and penetrating-injured intubated patients. Use of this new model provides an analytical method for addressing a significant limitation of both the standard TRISS and ASCOT models, which are not applicable to intubated injured patient assessment. In addition, use of this model will complement TRISS/ASCOT assessments of nonintubated trauma patients and thus permit appropriate assessments for both intubated and nonintubated injured patient study populations.
authors.affiliation: Bloomberg School of Public Health, Department of Environmental Health Sciences, Johns Hopkins University, Baltimore, MD, USA.
authors.forename: Edward G
authors.initials: EG
authors.lastname: Davis
authors.forename: Ellen J
authors.initials: EJ
authors.lastname: MacKenzie
authors.forename: William J
authors.initials: WJ
authors.lastname: Sacco
authors.forename: Lawrence W
authors.initials: LW
authors.lastname: Bain
authors.forename: Robert F
authors.initials: RF
authors.lastname: Buckman
authors.forename: Howard R
authors.initials: HR
authors.lastname: Champion
authors.forename: Peter S J
authors.initials: PS
authors.lastname: Lees
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D016208:Databases, Factual; D006801:Humans; D007223:Infant; D007442:Intubation, Intratracheal; D008875:Middle Aged; D015233:Models, Statistical; D010414:Pennsylvania; D011336:Probability; D012042:Registries; D016019:Survival Analysis; D015599:Trauma Severity Indices; D014947:Wounds and Injuries / Q000145:classification / Q000209:etiology / Q000401:mortality*