OBJECTIVES: To evaluate physical function and return to independence of geriatric trauma patients, to compare physical function outcomes of geriatric patients who sustained high-energy trauma with that of those who sustained low-energy trauma, and to identify predictors of physical function outcomes.
DESIGN: Retrospective SETTING:: Urban Level I trauma center PATIENTS:: Study group of 216 patients with high-energy trauma and comparison group of 117 patients with low-energy trauma. INTERVENTION: Injury mechanism (high- versus low-energy mechanism) MAIN OUTCOME MEASUREMENT:: Patient Reported Outcome Measurement Information System (PROMIS) Physical Function patient reported outcome measure, and change in living situation and mobility.
RESULTS: Physical function outcomes and return to independence differed between patients with high-energy and low-energy injuries. High-energy geriatric trauma patients had significantly higher PROMIS PF scores compared to low-energy geriatric trauma patients (PROMIS Physical Function score 42.2 ± 10.4 vs. 24.6 ± 10.4, p <0.001). High-energy geriatric trauma patients were able to ambulate outdoors without an assistive device in 67% of cases and were living independently 74% of the time in comparison to 28% and 45% of low-energy geriatric trauma patients respectively (p <0.001, p <0.001). Multivariate linear regression analysis demonstrated that low-energy mechanism injury was independently associated with a 13.2 point reduction in PROMIS Physical Function score (p < 0.001).
CONCLUSIONS: Geriatric patients greater than one year out from sustaining a high-energy traumatic injury appear to be functioning within the expected range for their age while low-energy trauma patients appear to be functioning substantially worse than both age-adjusted norms and their high-energy cohorts. LEVEL OF EVIDENCE: Prognostic Level III.