Table 1 Characteristics of HEMS missions to islands and the mainland in the period 1 October 2014–30 September 2017, N (%)

Missions, total

 Attended

 Transported

100 (9.8)

923 (90.2)

1,802 (37.9)

2,951 (62.1)

1,902 (32.9)

3,874 (67.1)

Mission duration in minutes, median (Q1,Q3)

113 [94,138]

98 [61,128]

–

Season

 Autumn

 Winter

 Spring

 Summer

228 (22.3)

138 (13.5)

255 (24.9)

402 (39.3)

1,080 (22.7)

851 (17.9)

1,356 (28.5)

1,466 (30.8)

1,308 (22.7)

989 (17.1)

1,611 (27.9)

1,868 (32.3)

Time of day (shift)

 Daytime

 Evening

 Nighttime

494 (48.3)

394 (38.5)

135 (13.2)

2,665 (56.1)

1,617 (34.0)

471 (9.9)

3,159 (54.7)

2,011 (34.8)

606 (10.5)

NACA score as assessed by HEMS staff

 0 No injury or disease, missing

 1 Minor disturbance—no intervention

 2 Slight/moderate disturbance

 3 Moderate/severe disturbance

 4 Serious/potential life-threatening disorder

 5 Acute life-threatening disorder

 6 Acute life-threatening disorder incl manifest organ failure

 7 Death

5 (0.5)

20 (2.0)

120 (11.7)

523 (51.1)

264 (25.8)

42 (4.1)

26 (2.5)

23 (2.2)

15 (0.3)

70 (1.5)

333 (7.0)

1,240 (26.1)

1,609 (33.9)

543 (11.4)

474 (10.0)

469 (9.9)

20 (0.4)

90 (1.6)

453 (7.8)

1,763 (30.5)

1,873 (32.4)

585 (10.1)

500 (8.7)

492 (8.5)

Naca score as assessed by HEMS staff, dichotomized

 NACA 0–3, non-critical emergency, total

  NACA 0–3, non-critical emergency, island tourists

  NACA 0–3, non-critical emergency, island inhabitants

 NACA 4–7, critical emergency, total

  NACA 4–7, critical emergency, island tourists

  NACA 4–7, critical emergency, island inhabitants

668 (65.3)

 199 (71.6)

 426 (63.3)

355 (34.7)

 79 (28.4)

 244 (36.4)

1658 (34.9)

–

–

3095 (65.1)

–

–

2326 (40.3)

–

–

3450 (59.7)

–

–

Disease category

 Cardiovascular

 Trauma

 Neurology

 Other

 Missing

285 (27.9)

157 (15.4)

154 (15.1)

356 (34.8)

71 (6.9)

2,030 (42.7)

1,212 (25.5)

766 (16.1)

591 (12.4)

154 (3.2)

2,315 (40.1)

1,369 (23.7)

920 (15.9)

947 (16.4)

225 (3.9)

Interventions performed during contact*

 Intubation

 Blood transfusion

 I.O access

 Ultrasound examination

 Mechanical chest compression

 Thoracotomy (too few to report)

61 (6.0)

7 (0.7)

10 (1.0)

82 (8.0)

21 (2.1)

1,051 (22.1)

141 (3.0)

321 (6.8)

1,125 (23.7)

379 (8.0)

1,112 (19.3)

148 (2.6)

331 (5.7)

1,207 (20.9)

400 (6.9)