van Beeck EFBC. A new definition of drowning: towards documentation and prevention of a global public health problem. Bull World Health Organ. 2005;83:853–6.

PubMed  PubMed Central  Google Scholar 

Modell JH, Gaub M, Maya F, Vestal B, Swarz H. Physiologic effects of near drowning with chlorinated fresh water, distilled water and isotonic saline. Anesthesiology. 1966;27:33–41.

Article  CAS  PubMed  Google Scholar 

Modell JH, Moya F, Williams HD, Weibley TC. Changes in blood gases and A-aDO2 during near-drowning. Anesthesiology. 1968;29:456–64.

Article  CAS  PubMed  Google Scholar 

Modell JH, Graves SA, Ketover A. Clinical course of 91 consecutive near-drowning victims. Chest. 1976;70:231–8.

Article  CAS  PubMed  Google Scholar 

Lott C, Truhlář A, Alfonzo A, Barelli A, González-Salvado V, Hinkelbein J, et al. European resuscitation council guidelines 2021: cardiac arrest in special circumstances. Resuscitation. 2021;161:152–219.

Article  PubMed  Google Scholar 

Alstrup K, Petersen JAK, Barfod C, Knudsen L, Rognås L, Møller TP. The Danish helicopter emergency medical service database: high quality data with great potential. Scand J Trauma Resusc Emerg Med. 2019;27:38.

Article  PubMed  PubMed Central  Google Scholar 

Garner AA, Barker CL, Weatherall AD. Retrospective evaluation of prehospital triage, presentation, interventions and outcome in paediatric drowning managed by a physician staffed helicopter emergency medical service. Scand J Trauma Resusc Emerg Med. 2015;23:92.

Article  PubMed  PubMed Central  Google Scholar 

Andersen MS, Johnsen SP, Sørensen JN, Jepsen SB, Hansen JB, Christensen EF. Implementing a nationwide criteria-based emergency medical dispatch system: a register-based follow-up study. Scand J Trauma Resusc Emerg Med. 2013;21:53.

Article  PubMed  PubMed Central  Google Scholar 

Christensen RE, Ottosen CI, Sonne A, Noernberg B, Juul AH, Steinmetz J, et al. Search and rescue helicopters for emergency medical service assistance: a retrospective study. Air Med J. 2021;40:269–73.

Article  PubMed  Google Scholar 

Alstrup K, Møller TP, Knudsen L, Hansen TM, Petersen JAK, Rognås L, et al. Characteristics of patients treated by the Danish Helicopter Emergency Medical Service from 2014–2018: a nationwide population-based study. Scand J Trauma Resusc Emerg Med. 2019;27:102.

Article  PubMed  PubMed Central  Google Scholar 

Danish Air Ambulance Bases [Internet]. Dan. Air Ambulance. [cited 2023 Nov 28]. Available from: https://www.akutlaegehelikopter.dk/en/about-us/bases/

Breindahl N, Wolthers SA, Jensen TW, Holgersen MG, Blomberg SNF, Steinmetz J, et al. Danish Drowning Formula for identification of out-of-hospital cardiac arrest from drowning. Am J Emerg Med. 2023;73:55–62.

Article  PubMed  Google Scholar 

Beerman S, Bierens J, Clemens T, Meddings D, Rahman A, Szpilman D. Clarification and Categorization of Non-fatal Drowning: a draft Position Statement for review and input by the global drowning community. 2019.

GlobalDenmark Translations. Executive Order on the Civil Registration System Act [Internet]. 2013 [cited 2024 Jan 4]. Available from: https://cpr.dk/media/17536/lovbekendtg_relse_eng_12070213.pdf

Lapostolle F, Petrovic T, Lenoir G, Catineau J, Galinski M, Metzger J, et al. Usefulness of hand-held ultrasound devices in out-of-hospital diagnosis performed by emergency physicians. Am J Emerg Med. 2006;24:237–42.

Article  PubMed  Google Scholar 

Breitkreutz R, Price S, Steiger HV, Seeger FH, Ilper H, Ackermann H, et al. Focused echocardiographic evaluation in life support and peri-resuscitation of emergency patients: a prospective trial. Resuscitation. 2010;81:1527–33.

Article  PubMed  Google Scholar 

Weiss M, Bernoulli L, Zollinger A. The NACA scale. Construct and predictive validity of the NACA scale for prehospital severity rating in trauma patients. Anaesthesist. 2001;50:150–4.

Article  CAS  PubMed  Google Scholar 

Raatiniemi L, Mikkelsen K, Fredriksen K, Wisborg T. Do pre-hospital anaesthesiologists reliably predict mortality using the NACA severity score? A retrospective cohort study. Acta Anaesthesiol Scand. 2013;57:1253–9.

Article  CAS  PubMed  PubMed Central  Google Scholar 

Møller TP, Ersbøll AK, Kjærulff TM, Bihrmann K, Alstrup K, Knudsen L, et al. Helicopter emergency medical services missions to islands and the mainland during a 3-year period in Denmark: a population-based study on patient and sociodemographic characteristics, comorbidity, and use of healthcare services. Scand J Trauma Resusc Emerg Med. 2021;29:152.

Article  PubMed  PubMed Central  Google Scholar 

Degree of Urbanisation (DEGURBA) - Eurostat, v1:2012 [Internet]. [cited 2023 Jan 26]. Available from: https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/degurba-eu

R Core Team. R: A language and environment for statistical computing. R Found Stat Comput Vienna Austria [Internet]. 2017; Available from: https://www.R-project.org/

Eich C, Russo SG, Heuer JF, Timmermann A, Gentkow U, Quintel M, et al. Characteristics of out-of-hospital paediatric emergencies attended by ambulance- and helicopter-based emergency physicians. Resuscitation. 2009;80:888–92.

Article  PubMed  Google Scholar 

Boylan E, McLaughlin R, O’Rorke G, Thorpe R, Monaghan D. Helicopter Emergency Medical Service (HEMS) in Northern Ireland: an Analysis of the First 100 Cases. Ulster Med J. 2019;88:98–101.

PubMed  PubMed Central  Google Scholar 

Moors XRJ, Alink MO, Bouman S, Schober P, De Leeuw M, Hoogerwerf N, et al. A nationwide retrospective analysis of out-of-hospital pediatric cardiopulmonary resuscitation treated by helicopter emergency medical service in the Netherlands. Air Med J. 2021;40:410–4.

Article  PubMed  Google Scholar 

Thorley L, Shepherd B, Donohue A, MacKillop A. Profiling helicopter emergency medical service winch operations involving physicians in Queensland, Australia. Emerg Med Australas. 2022;34:355–60.

Article  PubMed  Google Scholar 

Wolthers SA, Breindahl N, Jensen TW, Holgersen MG, Møller TP, Blomberg SNF, et al. Prehospital interventions and outcomes in traumatic cardiac arrest: a population-based cohort study using the Danish Helicopter Emergency Medical Services data. Eur J Emerg Med. 2023. https://doi.org/10.1097/MEJ.0000000000001108.

Article  PubMed  Google Scholar 

Mansuri F, Loux T, Brooks SE, Slye N, Lu Y, Lewis B, et al. Temporal trends in patient characteristics, injury mechanisms and outcomes in pediatric trauma admissions between 2010 and 2017. Am J Surg. 2020;220:468–75.

Article  PubMed  Google Scholar 

Holgersen MG, Jensen TW, Breindahl N, Kjerulff JLB, Breindahl SH, Blomberg SNF, et al. Pediatric out-of-hospital cardiac arrest in Denmark. Scand J Trauma Resusc Emerg Med. 2022;30:58.

Article  PubMed  PubMed Central  Google Scholar 

Donoghue AJ, Nadkarni V, Berg RA, Osmond MH, Wells G, Nesbitt L, et al. Out-of-hospital pediatric cardiac arrest: an epidemiologic review and assessment of current knowledge. Ann Emerg Med. 2005;46:512–22.

Article  PubMed  Google Scholar 

Kyriacou DNAE. Effect of immediate resuscitation on children with submersion injury. Pediatrics. 1994;94:137–42.

Article  CAS  PubMed  Google Scholar 

Ong MEH, Stiell I, Osmond MH, Nesbitt L, Gerein R, Campbell S, et al. Etiology of pediatric out-of-hospital cardiac arrest by coroner’s diagnosis. Resuscitation. 2006;68:335–42.

Article  PubMed  Google Scholar 

Munro S, Joy M, de Coverly R, Salmon M, Williams J, Lyon RM. A novel method of non-clinical dispatch is associated with a higher rate of critical Helicopter Emergency Medical Service intervention. Scand J Trauma Resusc Emerg Med. 2018;26:84.

Article  PubMed  PubMed Central  Google Scholar 

Grissom CK, Thomas F, James B. Medical helicopters in wilderness search and rescue operations. Air Med J. 2006;25:18–25.

Article  PubMed  Google Scholar 

Svenson JE, O’Connor JE, Lindsay MB. Is air transport faster? A comparison of air versus ground transport times for interfacility transfers in a regional referral system. Air Med J. 2006;25:170–2.

Article  PubMed  Google Scholar 

Sørensen OB, Bitzer K, Mikkelsen S, Christensen HC, Breindahl N. Lifeguards in Denmark. Ugeskr Laeger. 2023;185:V05230325.

PubMed  Google Scholar 

Breindahl N, Strange KF, Østergaard D, Collatz CH. Evaluation of a critical incident management system on mental health in lifeguard organisations: a retrospective study. BMJ Open Sport Exerc Med. 2023;9: e001499.

Article  PubMed  PubMed Central  Google Scholar 

Bierens J, Abelairas-Gomez C, Barcala Furelos R, Beerman S, Claesson A, Dunne C, et al. Resuscitation and emergency care in drowning: a scoping review. Resuscitation. 2021;162:205–17.

Article  CAS  PubMed  Google Scholar 

Soar J, Berg KM, Andersen LW, Böttiger BW, Cacciola S, Callaway CW, et al. Adult advanced life support: 2020 international consensus on cardiopulmonary resuscitation and emergency cardiovascular care science with treatment recommendations. Resuscitation. 2020;156:A80-119.

Article  PubMed  PubMed Central  Google Scholar 

Wolthers SA, Jensen TW, Breindahl N, Milling L, Blomberg SN, Andersen LB, et al. Traumatic cardiac arrest: a nationwide Danish study. BMC Emerg Med. 2023;23:69.

Article  PubMed  PubMed Central  Google Scholar 

Lu T-H, Lunetta P, Walker S. Quality of cause-of-death reporting using ICD-10 drowning codes: a descriptive study of 69 countries. BMC Med Res Methodol. 2010;10:30.

Article  CAS  PubMed  PubMed Central  Google Scholar 

Peden AE, Franklin RC, Mahony AJ, Scarr J, Barnsley PD. Using a retrospective cross-sectional study to analyse unintentional fatal drowning in Australia: ICD-10 coding-based methodologies verses actual deaths. BMJ Open. 2017;7: e019407.