Impact of an early mobilization protocol on outcomes in trauma patients admitted to the intensive care unit: A retrospective pre-post study

BACKGROUND Prolonged immobility has detrimental consequences for critically ill patients admitted to the intensive care unit (ICU). Previous work has shown that early mobilization of ICU patients is a safe, feasible and effective strategy to improve outcomes; however, few of these studies focused on trauma ICU patients. Our objective was to assess the impact of implementing an ICU early mobilization protocol (EMP) on trauma outcomes. METHODS We conducted a retrospective pre-post study of adult trauma patients (>18 years old) admitted to ICU at a Level I trauma center over a 2-year period prior to and following EMP implementation, allowing for a 1-year transition period. Data were collected from the Nova Scotia Trauma Registry. We compared outcomes (mortality, length of stay [LOS], ventilator-free days) between patients admitted during pre-EMP and post-EMP periods, and assessed for factors associated with outcomes using binary logistic regression and generalized linear models. RESULTS Overall, 526 patients were included in the analysis (292 pre-EMP, 234 post-EMP). Ages ranged from 18 years to 92 years (mean, 49.0 +/- 20.4 years) and 74.3% were men. The post-EMP group had lower ICU mortality (21.6% vs. 12.8%;p= 0.009) and in-hospital mortality (25.3% vs. 17.5%;p= 0.031). After controlling for confounders, patients in the post-EMP group were less likely to die in the ICU (odds ratio, 0.43; 95% confidence interval, 0.24-0.79;p= 0.006) or in-hospital (odds ratio, 0.55; 95% confidence interval; 0.32-0.94;p= 0.03). In-hospital LOS, ICU LOS, ICU-free days, and number of ventilator-free days were similar between the two groups. CONCLUSION Trauma patients admitted to ICU during the post-EMP period had decreased odds of ICU mortality and in-hospital mortality. This is the first study to demonstrate a significant reduction in trauma mortality following implementation of an ICU mobility protocol.