title: Evaluation of probability of survival using trauma and injury severity score method in severe neurotrauma patients.
abstract: OBJECTIVE
  Despite several limitations, the Trauma Injury Severity Score (TRISS) is normally used to evaluate trauma systems. The aim of this study was to evaluate the preventable trauma death rate using the TRISS method in severe trauma patients with traumatic brain injury using our emergency department data.
  
  
  METHODS
  The use of the TRISS formula has been suggested to consider definitively preventable death (DP); the deaths occurred with a probability of survival (Ps) higher than 0.50 and possible preventable death (PP); the deaths occurred with a Ps between 0.50 and 0.25. Deaths in patients with a calculated Ps of less than 0.25 is considered as no-preventable death (NP). A retrospective case review of deaths attributed to mechanical trauma occurring between January 1, 2011 and December 31, 2011 was conducted.
  
  
  RESULTS
  A total of 565 consecutive severe trauma patients with ISS>15 or Revised Trauma Score<7 were admitted in our institute. We excluded a total of 24 patients from our analysis : 22 patients younger than 15 years, and 2 patients with burned injury. Of these, 221 patients with head injury were analyzed in the final study. One hundred eighty-two patients were in DP, 13 in PP and 24 in NP. The calculated predicted mortality rates were 11.13%, 59.04%, and 90.09%. The actual mortality rates were 12.64%, 61.547%, and 91.67%, respectively.
  
  
  CONCLUSIONS
  Although it needs to make some improvements, the present study showed that TRISS performed well in predicting survival of traumatic brain injured patients. Also, TRISS is relatively exact and acceptable compared with actual data, as a simple and time-saving method.
authors.affiliation: Department of Neurosurgery, Chonnam National University Hospital & Medical School, Gwangju, Korea.
authors.forename: Jung-Ho
authors.initials: JH
authors.lastname: Moon
authors.forename: Bo-Ra
authors.initials: BR
authors.lastname: Seo
authors.forename: Jae-Won
authors.initials: JW
authors.lastname: Jang
authors.forename: Jung-Kil
authors.initials: JK
authors.lastname: Lee
authors.forename: Hyung-Sik
authors.initials: HS
authors.lastname: Moon
keywords: Survival; TRISS; Traumatic brain injury
references.citation: J Trauma. 2006 May;60(5):1002-8; discussion 1008-9
references.pmid: 16688062
references.citation: J Trauma. 2004 Sep;57(3):479-85; discussion 486-7
references.pmid: 15454791
references.citation: J Trauma. 1996 Jan;40(1):42-8; discussion 48-9
references.pmid: 8576997
references.citation: J Trauma. 2006 Jun;60(6):1238-43; discussion 1243-4
references.pmid: 16766966
references.citation: Sci Am. 1983 Aug;249(2):28-35
references.pmid: 6623052
references.citation: J Trauma. 1988 Jan;28(1):69-77
references.pmid: 3123707
references.citation: J Trauma. 2010 Mar;68(3):698-705
references.pmid: 20220424
references.citation: J Trauma. 1990 Nov;30(11):1356-65
references.pmid: 2231804
references.citation: J Trauma. 2000 Sep;49(3):530-40; discussion 540-1
references.pmid: 11003333
references.citation: J Trauma. 2006 Feb;60(2):305-11
references.pmid: 16508487
references.citation: Neurotherapeutics. 2011 Jan;8(1):39-53
references.pmid: 21274684
references.citation: Stat Med. 2008 Nov 29;27(27):5725-44
references.pmid: 18646254
references.citation: J Trauma. 1995 Jan;38(1):83-8
references.pmid: 7745667
references.citation: Acad Emerg Med. 2004 Feb;11(2):181-6
references.pmid: 14759963
references.citation: J Trauma. 1991 Apr;31(4):471-81; discussion 481-2
references.pmid: 2020032
references.citation: Am Surg. 2012 Oct;78(10):1166-71
references.pmid: 23025964
references.citation: World J Emerg Surg. 2006 Apr 11;1:12
references.pmid: 16759417
references.citation: J Trauma. 2010 Apr;68(4):761-70
references.pmid: 20386271
references.citation: J Trauma. 2004 May;56(5):1090-6
references.pmid: 15179251