Abstract:
INTRODUCTION : Over 90% of trauma-related deaths worldwide, ensue in low- and middle-income countries. Multiple
useful trauma scoring systems have been devised. Although validated in high-income countries, they cannot
always be replicated in resource-limited countries. This study compares six trauma scores to identify the bestsuited
system to use for polytrauma patients in a hospital in Pretoria, South Africa.
METHODS : This is an observational retrospective analysis of polytrauma admissions from 1 July 2016 to 31
December 2016. Data collected from patients' records from the EC of Steve Biko Academic Hospital, was analysed
using Stata Release 14. Outcomes were recorded as 30-day survival, ICU– and overall hospital LOS. Scores
pertaining to patient mortality, were compared in terms of sensitivity, specificity, and cut-off points based on
ROC curve. Finally, for LOS Pearson correlation analysis was used.
RESULTS : At the best calculated mortality prediction cut-points for the scores, the sensitivities and specificities were
respectively 87% and 68% for TRISS, 81% and 61% for ISS, RTS yielded 81% and 60%, while for REMS it was
61% and 69%. The SI and RSI (cut-points used in agreement with the literature) produced sensitivities 58% and
only 48%, and specificities of 73% and 83%, respectively.
45(41,7%) patients required ICU admission. Though the ICU LOS best correlated with ISS(r = 0.2710), the ICU
LOS correlation coefficient was weak for all trauma scores. None of the scores had a significant p value for
hospital LOS.
DISCUSSION : Among the scores compared, TRISS had the highest sensitivity and NPV for mortality prediction in
this South African polytrauma population. ISS correlated best with ICU LOS. However, compared to developed
countries, ROC analyses & predictability of these scores fare relatively worse, and no correlation was found with
hospital LOS. Therefore, we conclude that further studies are needed to ascertain a more suitable system for
resource-limited settings.
