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Table 1 Baseline demographic characteristics of elderly trauma patients

From: The impact of age and receipt antihypertensives to systolic blood pressure and shock index at injury scene and in the emergency department to predict massive transfusion in trauma patients

  Overall elderly
(n = 1949)
Non-antihypertensive group
(n = 951)
Antihypertensive group
(n = 998)
P value
Age (IQR), yr 76.0 (70.0–81.0) 75.0 (69.0–80.0) 77.0 (71.0–82.0) < 0.001
Male sex, n (%) 1002 (51.4) 539 (56.7) 463 (46.4) < 0.001
Comorbidities, n (%)
 Diabetes 529 (27.1) 167 (17.6) 362 (36.3) < 0.001
 Cerebrovascular accident 271 (13.9) 92 (9.7) 179 (17.9) < 0.001
 Congestive heart failure 68 (3.5) 29 (3.0) 39 (3.9) 0.575
 Chronic renal disease 127 (6.5) 34 (3.6) 93 (9.3) < 0.001
 Traumatic brain injury, n (%) 96 (4.9) 57 (6.0) 39 (3.9) 0.033
 Prehospital response time (IQR), min 9.0 (6.0–14.0) 9.0 (7.0–14.0) 9.0 (6.0–15.0) 0.912
 Total prehospital time (IQR), min 24.0 (17.5–33.0) 25.0 (17.5–34.0) 23.0 (17.5–32.0) 0.498
 Prehospital IV hydration, n (%) 57 (2.9) 38 (4.0) 19 (1.9) 0.014
Physiological parameters (IQR)
 At the injury scene
  SBP, mmHg 140.0 (121.0–160.0) 130.0 (120.0–153.0) 140.0 (120.0–160.0) 0.048
  HR, beats per min 80.0 (72.0–90.0) 80.0 (72.0–90.0) 82.0 (72.0–93.5) 0.414
  SI 0.59 (0.51–0.71) 0.60 (0.51–0.70) 0.59 (0.50–0.71) 0.571
 At ED arrival
  SBP, mmHg 147.0 (124.0–165.0) 134.0 (121.0–162.0) 149.0 (128.0–168.0) < 0.001
  HR, beats per min 82.0 (71.0–94.0) 82.0 (71.0–95.0) 82.0 (71.0–94.0) 0.603
  SI 0.57 (0.47–0.69) 0.58 (0.49–0.72) 0.56 (0.47–0.68) 0.001
  GCS 15.0 (14.0–15.0) 15.0 (15.0–15.0) 15.0 (14.0–15.0) 0.131
 Mechanism of injury, n (%) 0.433
  Blunt 1916 (98.3) 933 (98.1) 983 (98.5)  
  Penetrating 33 (1.7) 18 (1.9) 15 (1.5)  
 ISS (IQR) 9.0 (5.0–14.0) 9.0 (5.0–16.0) 9.0 (5.0–13.0) 0.195
 RTS (IQR) 12.0 (11.0–12.0) 12.0 (12.0–12.0) 12.0 (11.0–12.0) 0.004
 Clinical course and interventions
  Length of stay in ICU (IQR), day 0 (0–0.67) 0 (0–0.65) 0 (0–0.67) 0.932
  Transfusion, n (%) 443 (22.7) 210 (22.1) 233 (23.3) 0.794
  Massive transfusion, n (%) 56 (2.9) 37 (3.9) 19 (1.9) 0.009
  30-day mortality, n (%) 149 (7.6) 89 (9.4) 60 (6.0) 0.005
  1. IQR denotes interquartile range
  2. ED emergency department, ICU intensive care unit, IV intravenous, HR heart rate, GCS glasgow coma scale, ISS injury severity score, RTS revised trauma score, SBP systolic blood pressure, SI shock index