Comparison of the sepsis-2 and sepsis-3 definitions in severely injured trauma patients

PURPOSE: To evaluate the performance of the new SOFA-based sepsis definition in trauma patients. MATERIALS AND METHODS: A single-centre, retrospective, observational study. Primary outcome was 30-day mortality including a censoring analysis for early deaths. The primary outcome was evaluated with logistic regression, receiver operating characteristics (ROC) curves and Kaplan-Meier survival analyses. RESULTS: 722 severely injured patients were included between 2007 and 2016. 315 patients fulfilled the sepsis-2 criteria and 148 fulfilled the sepsis-3 criteria during the first ten days in the ICU. The odds ratios for 30-day mortality were 0.7 (CI 0.4-1.2) for sepsis-2 and 1.5 (CI 0.8-2.6) for sepsis-3. When censoring patients dying at day 1, sepsis-3 became associated with 30-day mortality whereas sepsis-2 did not. This finding was persistent and enhanced through continuing day-by-day censoring of early deaths. The same pattern was seen for the ROC curves analyses, censoring of early deaths resulted in significant discriminatory properties for sepsis-3 but not for sepsis-2. CONCLUSIONS: The sepsis-3 definition identifies much fewer patients and is more strongly associated with adverse outcomes than the sepsis-2 definition. The sepsis-3 definition seems to be useful in the post trauma setting.