Table 1.
Baseline demographic characteristics of elderly 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 |
IQR denotes interquartile range
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