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Table 3 Demographics and pre-hospital characteristics for 7,133 patients treated by the Danish Helicopter Emergency Medical Services (2014-2018)a

From: Characteristics of patients treated by the Danish Helicopter Emergency Medical Service from 2014-2018: a nationwide population-based study

 Air liftedGround escortedAssistedTotal
patientspatientspatients 
n = 4,639 (%)n = 174 (%)n = 2,320 (%)n = 7,133 (%)
Gender
 Male (%)3,051 (66%)114 (66%)1,381 (60%)4,546 (64%)
 Female (%)1,468 (32%)57 (33%)818 (35%)2,343 (33%)
Age 56,5 (32-72)  
 median age, years (IQR)61 (47-72) 56 (29,5-71))60 (42-72)
 <1 month (%)16 (0,3%)1 (0,6%)14 (0,6%)31 (0,4%)
 1 month-1 year (%)80 (2%)8 (5%)80 (3%)168 (2%)
 2-17 years (%)270 (6%)21 (12%)200 (9%)491 (7%)
 18-66 years (%)2,468 (53%)82 (47%)1,174 (51%)3,724 (52%)
 67+ years (%)1,765 (38%)60 (34%)799 (34%)2,624 (37%)
Pre-hospital diagnostic groups
 Cardio-vascular (%)2,004 (43%)54 (31%)874 (38%)2,932 (41%)
  Acute myocardial infarction1,030 (51%)b2 (1%)b8 (1%)b1,040 (35%)b
  Cardiac arrest588 (29%)b42 (24%)b586 (67%)b1,216 (41%)b
 Neurology (%)851 (18%)29 (17%)258 (11%)1,138 (16%)
 Respiratory (%)121 (3%)19 (11%)63 (3%)203 (3%)
 Trauma (%)999 (22%)42 (24%)592 (26%)1,633 (23%)
 Burns (%)121 (3%)4 (2%)28 (1%)153 (2%)
 Poisoning (%)9 (0,2%)013 (0,6%)22 (0,3%)
 Obstetric (%)6 (0,1%)01 (0,04%)7 (0,1%)
 Abdominal (%)113 (2%)2 (1%)42 (2%)157 (2%)
 Other medical condition (%)415 (9%)24 (14%)449 (19%)888 (12%)
Severity according to NACA score
 NACA 0 (%)2 (0,04%)014 (0,6%)16 (0,2%)
 NACA 1 (%)7 (0,2%)1 (0,6%)97 (4%)105 (2%)
 NACA 2 (%)143 (3%)3 (2%)363 (16%)509 (7%)
 NACA 3 (%)1,205 (26%)29 (17%)906 (39%)2,140 (30%)
 NACA 4 (%)1,983 (43%)68 (39%)239 (10%)2,290 (32%)
 NACA 5 (%)678 (15%)30 (17%)26 (1%)734 (10%)
 NACA 6 (%)596 (13%)41 (24%)44 (2%)681 (10%)
 NACA 7 (%)22 (0,5%)2 (1%)627 (27%)651 (9%)
NACA score - non-critical vs. critical emergency
 NACA 0-3 (%)1,357 (29%)33 (19%)1,380 (59%)2,770 (39%)
 NACA 4-7 (%)3,279 (71%)141 (81%)936 (40%)4,356 (61%)
Intervention
 Intubation (%)1,082 (23%)48 (28%)329 (14%)1,459 (21%)
  by HEMS62641213880
  by other4567116579
 Blood administration (%)141 (3%)7 (4%)47 (2%)195 (3%)
 Intraosseous access (%)255 (6%)15 (9%)192 (8%)462 (7%)
 ACCD (%)297 (6%)21 (12%)210 (9%)528 (7%)
 Ultrasound examination (%)932 (20%)51 (29%)558 (24%)1,541 (22%)
 Chest tube/thoracostomi (%)28 (0,6%)2 (1%)10 (0,4%)40 (0,6%)
 At least one intervention performed (%)1,636 (35%)85 (49%)707 (30%)2,428 (34%)
Mission outcome for ground assisted patients (n=2320)
 Completed on scene (%)  144 (6%) 
 Admitted to hospital by ambulance (%)  1,171 (51%) 
 Admitted to hospital by paramedic/nurse (%)  155 (7%) 
 Escorted by rapid response vehicle (%)  222 (10%) 
 Patient dead on scene (%)  46 (2%) 
 Patient inaccessible  1 (0,04%) 
 Standby  2 (0,1%) 
 Patient pronounced dead on scene (%)  576 (25%) 
 No information  3 (0,1%) 
Mission to an Island not connected by road to the mainland
 Total (%)867 (19%)3 (1,7%)106 (5%)976 (14%)
  1. aThe total number of measurements in each of the variables is not in agreement with the total number of patients in the three groups due to missing data. Missing data varied from 0,1-4,3% across the variables
  2. bThe per centages presented for AMI and cardiac arrest represent proportions in relation to the cardio-vascular diagnostic group