Helicopter emergency medical service (HEMS) activity after increased distance to out-of-hours services: an observational
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RESEARCH ARTICLE
Open Access
Helicopter emergency medical service (HEMS) activity after increased distance to out-of-hours services: an observational study from Norway Dag Ståle Nystøyl1,2* , Jo Røislien1,3, Øyvind Østerås4, Steinar Hunskaar2,5, Hans Johan Breidablik6 and Erik Zakariassen2,5
Abstract Background: Organizational changes in out-of-hour (OOH) services may have unintended consequences for other prehospital services. Reports indicate an increased use of helicopter emergency medical services (HEMS) after changes in OOH services in Norway due to greater geographical distances for the on-call doctors. We investigated whether HEMS dispatches increased when nine municipalities in Sogn og Fjordane County merged into one large inter-municipal OOH district. Methods: All primary dispatches of the HEMS in the county between 2004 and 2013 were included. We applied interrupted time series regression to monthly aggregated data to evaluate the impact of the organizational change 1 April 2009. The nine target municipalities were compared to the rest of the municipalities in the county, which served as a control group. A quasipoisson model adjusted for seasonality was found to be most applicable. Results: We included 8,751 dispatches, 5,009 (57.2%) of which were completed with a patient encounter. Overall, we found no alteration in requests for HEMS after 2009 (p = 0.251). Separate analyses of the target municipalities and control group revealed no significant increase after 2009 (p = 0.400 and p = 0.056, respectively). When categorizing the municipalities into urban or rural, we found a general increase in HEMS dispatches for the rural group over the 10-year span (p = 0.045) but no added increase after 2009 (p = 0.502). The urban subgroup showed no change. Distance from the OOH service in regards to travel increased within the nine municipalities after 2009, median [quartiles] (5.0[3.0, 6.2] km vs 26.5[5.0, 62.2] km, p < 0.001). Conclusion: After relocating nine local OOH services into one large inter-municipal OOH district, we found no increase in requests for HEMS. Keywords: Emergency medical services, Primary health care, Air ambulances, Norway, HEMS, General practitioners, After-hours care, Out-of-hours medical care
* Correspondence: [email protected] 1 Department of Research, Norwegian Air Ambulance Foundation, Oslo, Norway 2 Health Services Research Group, Department of Global Public Health and Primary Care, University of Bergen, PBox 7810, 5020 Bergen, Norway Full list of author information is available at the end of the article © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons li
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