• Oscar Hernandez Dominguez, Areg Grigorian, Michael Lekawa, Sebastian D Schubl, Theresa Chin, Dennis Y Kim, Christian de Virgilio, and Jeffry Nahmias.
• Department of Surgery, Division of Trauma, Burns and Surgical Critical Care, University of California, Irvine, Orange, CA. Electronic address: oaherna1@uci.edu.
• Air Med. J. 2020 Jul 1; 39 (4): 283-290.

ObjectiveSeveral reports have found helicopter emergency medical services (HEMS) to be associated with a lower risk of mortality compared with ground emergency medical services (GEMS); however, most studies did not control for transport time or stratify interfacility versus scene. We hypothesize that the HEMS transport rate has decreased nationally and that the risk of mortality for HEMS is similar to GEMS when adjusting for transport time and stratifying by scene or interfacility.MethodsThe Trauma Quality Improvement Program (2010-2016) was queried for adult patients transported by HEMS or GEMS. Multivariable logistic regression was used.ResultsThe HEMS transport rate decreased by 38.2% from 2010 to 2016 (P < .001). After controlling for known predictors of mortality and transport time, HEMS was associated with a decreased risk of mortality compared with GEMS for adult trauma patient transports (odds ratio = 0.74; 95% confidence interval [CI], 0.71-0.77; P < .001). Compared with GEMS, HEMS transports from the scene were associated with a decreased risk of mortality (OR = 0.63; 95% CI, 0.60-0.66; P < .001), whereas HEMS interfacility transfer was associated with an increased risk of mortality (OR = 1.22; 95% CI, 1.14-1.31; P < .001).ConclusionThe rate of HEMS transports in trauma has decreased by nearly 40% over the past 7 years. Our results suggest that HEMS use for scene transports is beneficial for the survival of trauma patients.Copyright © 2020 Air Medical Journal Associates. Published by Elsevier Inc. All rights reserved.

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