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Table 1 Patient characteristics by treatment group

From: Prehospital response model and time to CT scan in blunt trauma patients; an exploratory analysis of data from the head injury retrieval trial

  Road paramedic (n = 505) HIRT HEMS (n = 336) GSA HEMS (n = 48) p-value
Patient age (years) 46.3 (20.5) 45.7 (21.4) 37.3 (18.2) 0.02,§ ¥
Gender (male) 360 (71%) 252 (75%) 34 (71%) 0.5
Mechanism of injury     
- Transport 318 (63%) 219 (65% 44 (92%) 0.003,§ ¥
- Fall 137 (27%) 86 (26%) 3 (6%)  
- Other 50 (10%) 31 (9%) 1 (2%)  
ISS 21.3 (13.3) 23.2 (15.1) 21.7 (11.4) 0.13
NISS 27.2 (16.9) 30.2 (18.1) 27.1 (15.1) 0.04,*
First GCS 13 (8–15) 10 (4–14) 13 (6–15) <0.001,*¥
First SBP (mmHg) 113.5 (37.8) 114.3 (41.9) 103.3 (43.1) 0.20
  1. Statistics reported as N (%), mean (SD) or median (IQR) as appropriate. ISS, Injury Severity Scale. NISS, New Injury Severity Scale. GCS, Glasgow Coma Scale. SBP, Systolic blood pressure.
  2. *indicates difference between Road Paramedics and HIRT HEMS at <0.05 level.
  3. §indicates difference between Road paramedics and GSA HEMS at <0.05 level.
  4. ¥indicates difference between HIRT HEMS and GSA HEMS at <0.05 level.