ABSTRACT
PURPOSE: Polytrauma is increasingly recognized as a disease beyond anatomical injuries. Due to population growth, centralization, and slow uptake of preventive measures, major trauma presentations in most trauma systems show a slow but steady increase. The proportional contribution of polytrauma patients to this increase is unknown. METHODS: A 13-year retrospective analysis ending 31/12/2021 of all major trauma admissions (ISS > 15) to a level-1 trauma center were included. Polytrauma was classified using the Newcastle definition. Linear regression analysis was used to compare the rates of patient presentation over time. Logistic regression was used to measure for change in proportion of polytrauma. Data are presented as median (IQR), with odds ratios and 95% confidence intervals as appropriate. RESULTS: 5897 (age: 49 ± 43 years, sex: 71.3% male, ISS: 20 ± 9, mortality: 10.7%) major trauma presentations were included, 1,616 (27%) were polytrauma (age: 45 ± 37 years, 72.0% male, ISS: 29 ± 14, mortality: 12.7%). Major trauma presentations increased significantly over the study period (+ 8 patients per year (3-14), p < 0.01), aged significantly (0.42 years/year (0.25-0.59, p < 0.001). The number of polytrauma presentations per year did not change significantly (+ 1 patients/year (- 1 to 4, p > 0.2). Overall unadjusted mortality did not change (OR 0.99 (0.97-1.02). Polytrauma mortality fell significantly (OR 0.96 (0.92-0.99)) over the study period. CONCLUSIONS: Polytrauma patients represent about 25% of the major trauma admissions, with higher injury severity, static incidence and higher but improving mortality in comparison to all major trauma patients. Separate reporting and focused research on this group are warranted as monitoring the entire major trauma cohort does not identify these specifics of this high acuity subgroup.
ABSTRACT
PURPOSE: The risk of death after traumatic injury in developed trauma systems is at an all-time low. Among 'major trauma' patients (injury severity score, ISS > 15), the risk of dying is less than 10%. This group contains critical polytrauma patients (ISS 50-75), with high risks of death. We hypothesized that the reduction in trauma mortality was driven by reduction in moderate injury severity and that death from critical polytrauma remained persistently high. METHODS: A 20-year retrospective analysis ending December 2021 of a Level-1 trauma center's registry was performed on all trauma patients admitted with ISS > 15. Patients' demographics, injury severity and outcomes were collected. Multivariate logistic regression analysis was performed. Mortality was examined for the entire study group and separately for the subset of critical polytrauma patients (ISS 50-75). RESULTS: A total of 8462 severely injured (ISS > 15) trauma patients were identified during the 20-year period. Of these 238 (2.8%) were critical polytrauma patients (ISS 50-75). ISS > 15 mortality decreased from 11.3 to 9.4% over the study period (Adjusted OR 0.98, 0.97-0.99). ISS 50-75 mortality did not change significantly (46.2-60.0%), adjusted OR 0.96, 0.92-1.00). CONCLUSION: The improvement in trauma mortality over the past 20 years has not been experienced equally. The ISS50-75 critical polytrauma mortality is a practical group to capture. It could be a group for deeper study and reporting to drive improvement.
