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Table 1 Summary of HEMS dispatch comparing HEMS paramedic dispatch vs non-clinical dispatch

From: A novel method of non-clinical dispatch is associated with a higher rate of critical Helicopter Emergency Medical Service intervention

  Total
(n = 4703)
HEMS paramedic dispatch
(n = 2519)
Non-clinical dispatch
(n = 2184)
p-value
Result
 Patient conveyed 1681 (36%) 960 (38%) 721 (33%) NS
 Patient Treated 1228 (26%) 635 (25%) 593 (27%) NS
 Stand down at scene 113 (2%) 68 (3%) 45 (2%) NS
 Stand down en route 1681 (36%) 856 (34%) 825 (38%) < 0.001
Interventions
 RSI 490 (10%) 245 (10%) 245 (11%) NS
 Blood products 169 (4%) 77 (3%) 92 (4%) NS
 Code red 122 (3%) 45 (2%) 77 (4%) NS
 Thoracotomy 4 (0.1%) 4 (0.2%) 0 (0%) NS
 Thoracostomy 262 (6%) 116 (5%) 146 (7%) 0.01
Job type
 RTC 1988 (42%) 1060 (42%) 928 (42%) NS
 Accidental injury 1158 (25%) 589 (23%) 569 (26%) NS
 Medical 522 (11%) 285 (11%) 237 (11%) NS
 Assault 387 (8%) 192 (8%) 195 (9%) NS
 Intentional self-harm 258 (5%) 155 (6%) 103 (5%) NS
 Sport/leisure 257 (5%) 151 (6%) 106 (5%) NS
 Other 106 (2%) 70 (3%) 36 (2%) NS
 Exposure 27 (0.6%) 17 (1%) 10 (0.5%) 0.003
Job dispatch
 Cat 1 (immediate) 1586 (34%) 704 (30%) 882 (40%) < 0.001
 Cat 2 (interrogate) 2056 (44%) 1300 (52%) 756 (35%) < 0.001
 Cat 3 (crew request) 1061 (23%) 515 (20%) 546 (25%) < 0.001
Time intervals
 999 to HEMS, median, IQR 7 (4–17) 7 (4–17) 7 (4–18) 0.36
 999 to scene, median, IQR 36 (26–51) 36 (26–51) 36 (26–52) 0.97
  1. HEMS helicopter emergency medical service, RSI rapid sequence induction of anaesthesia, IQR interquartile range