Table 2.
Demographic and clinical characteristics of patients in the derivation set distributed by 30-day mortality
| Variable | Survivors N = 5226 |
Non-survivors N = 750 |
p value |
|---|---|---|---|
| Age (groups) | < 0.001 | ||
| < 50 | 56.9 | 30.8 | |
| 50–65 | 22.8 | 18.1 | |
| 65–75 | 11.7 | 19.7 | |
| > 75 | 8.6 | 31.3 | |
| Sex (% male) | 78.7 | 71.7 | < 0.001 |
| PRECOAG | 11.3 | 30.4 | < 0.001 |
| Pre-hospital attention | 75.6 | 79.7 | 0.014 |
| Pre-hospital intubation | 20.7 | 54.8 | < 0.001 |
| High Risk mechanism | 34.5 | 63.1 | < 0.001 |
| Mechanism penetrant | 6.0 | 4.3 | 0.054 |
| PUPILS | < 0.001 | ||
| Normal | 93.8 | 52.7 | |
| Unilateral mydriasis | 5.3 | 19.6 | |
| Bilateral mydriasis | 0.9 | 27.7 | |
| GCS ≤ 8 (%) | 18.6 | 65.9 | < 0.001 |
| MAIS-Head | 37.3 | 72.4 | < 0.001 |
| MAIS-Thorax | 39.6 | 34.4 | 0.006 |
| MAIS-Abdomen | 12.1 | 11.5 | 0.601 |
| MAIS-Ext Upper | 2.8 | 1.7 | 0.082 |
| MAIS-Ext Lower | 18.2 | 14.4 | 0.011 |
| MAIS-External | 1.0 | 2.0 | 0.010 |
| Haemodynamic failure | 17.5 | 57.1 | < 0.001 |
| Respiratory failure | 9.4 | 26.4 | < 0.001 |
| Coagulopathy | 12.6 | 37.5 | < 0.001 |
| Mechanical ventilation | 45.0 | 82.8 | < 0.001 |
| Massive haemorrhage | 5.0 | 16.8 | < 0.001 |
Values expressed as percentages
PRECOAG, prior treatment with antiplatelets or anticoagulants; GCS, Glasgow Coma Score; AIS, Abbreviated Injury Scale; MAIS, AIS ≥ 3; p value, calculated using chi-square test