Table 2.
Patient characteristics and outcomes of patients in training dataset and testing dataset
| Variables | Training dataset (n = 332) | Testing dataset (n = 146) | p value |
|---|---|---|---|
| Male (n, %) | 241 (72.6) | 115 (78.8) | 0.189 |
| Age (years) | 44.82 ± 13.30 | 46.10 ± 14.94 | 0.350 |
| Injury cause (n, %) | 0.992 | ||
| Traffic injury | 183 (55.1) | 82 (56.2) | |
| Mechanical injury | 3 (0.9) | 1 (0.7) | |
| Sharp injury | 23 (6.9) | 11 (7.5) | |
| Falling injury | 102 (30.8) | 44 (30.1) | |
| Others | 21 (6.3) | 8 (5.5) | |
| Injury type (n, %) | 0.999 | ||
| Penetrating injury | 104 (31.3) | 46 (31.5) | |
| Blunt injury | 228 (68.7) | 100 (68.5) | |
| Rib fracture (n, %) | 106 (31.9) | 48 (32.9) | 0.922 |
| Pelvis fracture (n, %) | 47 (14.2) | 14 (9.6) | 0.219 |
| ISS | 15.00 (9.00, 22.00) | 17.00 (9.00, 22.00) | 0.568 |
| GCS | 14.35 ± 2.22 | 14.51 ± 1.84 | 0.426 |
| Body temperature (°C) | 36.85 ± 0.58 | 36.74 ± 0.51 | 0.068 |
| HR (beats/min) | 93.92 ± 18.47 | 91.86 ± 18.39 | 0.262 |
| SBP (mmHg) | 117.79 ± 19.84 | 119.04 ± 19.65 | 0.523 |
| SI | 0.83 ± 0.29 | 0.80 ± 0.25 | 0.260 |
| DBP (mmHg) | 71.93 ± 13.59 | 71.73 ± 13.24 | 0.879 |
| HB (g/L) | 104.70 ± 31.92 | 110.10 ± 27.80 | 0.077 |
| PT (s) | 12.00 (11.30, 13.62) | 11.80 (11.20, 13.20) | 0.199 |
| APTT (s) | 28.70 (24.50, 35.15) | 28.15 (23.63, 34.22) | 0.294 |
| INR | 1.08 (1.00, 1.21) | 1.05 (0.99, 1.18) | 0.366 |
| RBC transfusion (U) | 0.00 (0.00, 2.00) | 0.00 (0.00, 0.00) | 0.252 |
| Plasma transfusion (mL) | 0.00 (0.00, 0.00) | 0.00 (0.00, 0.00) | 0.274 |
| Massive transfusion (n,%) | 33 (9.9) | 10 (6.8) | 0.361 |
| Complication (n, %) | 0.700 | ||
| Infections | 44 (13.2) | 18 (12.3) | |
| MODS | 8 (2.4) | 2 (1.4) | |
| Acute kidney failure | 2 (0.6) | 0 (0.0) | |
| Duration of mechanical ventilation (days) | 0.00 (0.00, 0.00) | 0.00 (0.00, 1.00) | 0.823 |
| ICU LOS(days) | 0.00 (0.00, 4.25) | 1.00 (0.00, 4.00) | 0.565 |
| Hospital LOS (days) | 18.00 (11.00, 28.00) | 19.00 (10.25, 29.00) | 0.975 |
| 24 h mortality (n, %) | 7 (2.1) | 2 (1.4) | 0.856 |
| Hospital mortality (n,%) | 13 (3.9) | 6 (4.1) | 0.999 |
Data are present as mean ± standard deviation or median (quartile)
ISS injury severity score, GCS glasgow coma score, HR heart rate, SBP systolic blood pressure, SI shock index, DBP diastolic blood pressure, Hb hemoglobin, PT prothrombin time, APTT activated partial thromboplastin time, INR international normalized ratio, RBC red blood cells, MODS multiple organs dysfunction syndromes, length of stay LOS, ICU intensive care unit