Structured Abstract
OBJECTIVE
The Resuscitation Outcomes Consortium (ROC) is a network of 11 centers and 60 hospitals conducting emergency care research. For many procedures, high volume centers demonstrate superior outcomes versus low volume centers. This remains controversial for trauma center outcomes. This study investigated the relationship of trauma center volume on outcome.
METHODS
This study was a secondary analysis of prospectively collected data from the ROC multicenter out-of-hospital Hypertonic Saline Trial in patients with GCS ≤ 8 (traumatic brain injury [TBI]) or SBP ≤ 90 and pulse ≥ 110 (shock). Regression analyses evaluated associations between trauma volume and the following outcomes: 24 hour mortality, 28 day mortality, ventilator free days (VFD), Multiple Organ Dysfunction Scale (MODS) incidence, worst MODS score, and poor 6 month Glasgow outcome scale extended.
RESULTS
2070 patients were analyzed: 1251 in the TBI cohort and 819 in the shock cohort. Overall, 24-hour and 28-day mortality were 16% and 25%, respectively. For every increase of 500 trauma center admissions, there was a 7% decreased odds of both 24-hour and 28-day mortalities for all patients. As trauma center volume increased, non-organ dysfunction complications increased, VFD increased and worst MODS score decreased. The associations with higher trauma center volume were similar for the TBI cohort, including better neurologic outcomes at 6 months, but not for the shock cohort.
CONCLUSIONS
Increased trauma center volume was associated with increased survival, more ventilator free days and less severe organ failure. Trauma system planning and implementation should avoid unnecessary duplication of services.