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Table 2 Characteristics of the trauma patients used to validate the BATT score

From: Validation of the BATT score for prehospital risk stratification of traumatic haemorrhagic death: usefulness for tranexamic acid treatment criteria

  N = 104,862 Missing
Mean age (SD) 62 (24) 0
 < 18, N (%) 5616 (5)
 18–44, N (%) 19,744 (19)
 45–64, N (%) 26,354 (25)
 65–74, N (%) 13,123 (13)
 ≥75, N (%) 40,025 (38)
Sex female, N (%) 47,346 (45) 0
Penetrating injury, N (%) 3189 (3) 0
Circumstances, N (%)   0
 Motor vehicle crash 19,709 (19)
 Fall less than 2 m 65,573 (62)
 Fall more than 2 m 10,604 (10)
 Blast – Blow – Crush 5266 (5)
 Shooting 234 (0)
 Stabbing 2538 (2)
 Other 1938 (2)
First systolic blood pressure, mean (SD) 138 (28) 12,450 (12)
First systolic blood pressure < 90 mmHg, N (%) 3033 (3)  
First Glasgow coma scale, N (%)   12,695 (12)
 14–15 90,579 (86)
 9–13 8566 (8)
 3–8 5717 (6)
First heart rate, mean (SD) 86 (20) 11,479 (11)
Heart rate > 120 bpm, N (%) 5475 (5)  
Time from injury to ambulance arrival < 3 h, N (%) 79,430 (76) 50,496 (48)
Time from injury to hospital admission < 3 h, N (%) 63,246 (60) 50,465 (48)
Injury Severity Score, mean (SD) 16 (9) 0
 ISS 9–15, N (%) 58,695 (56)
 ISS 16–24, N (%) 24,635 (23)
 ISS 25–34, N (%) 17,682 (17)
 ISS ≥ 35, N (%) 3850 (4)
Tranexamic acid treatment 9915 (9) 13,115 (13)
 Prehospital 5185 (5)
 Hospital 4576 (4)
 Unknown 176 (0.1)  
Any blood product received 4922 (5) 0
 Massive transfusion protocol activated 2487 (2)
 Blood received within 6 h of injury 2277 (2)