Table 4.
Sample characteristics - Nominal and ordinal variables
| Variable | Category | Count/% | With Outcome 0 (Alive)/% | With Outcome 1 (Dead)/% |
|---|---|---|---|---|
| Race | Asian | 977/60.3% | 858/87.8% | 119/12.2% |
| Other | 643/39.7% | 559/86.9 | 84/13.1% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Mechanism of Injury (MOI) | MVC1 | 486/30% | 413/85% | 73/15% |
| Fall | 551/34% | 495/89.8% | 56/10.2% | |
| Pedestrian | 268/16.5% | 216/80.6% | 52/19.4% | |
| Other | 315/19.4% | 293/93% | 22/7% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Arrival mode | Ambulance | 1350/83.3% | 1167/86.4% | 183/13.5% |
| Other | 270/16.7% | 250/92.6% | 20/7.4% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Midline shift | No | 1260/77.8% | 1155/91.7% | 105/8.3% |
| Yes | 360/22.2% | 262/72.8% | 98/27.2% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| CT findings/mass lesion | SDH2 | 455/28.1% | 380/83.5% | 75/16.5% |
| EDH3 | 371/22.9% | 352/94.9% | 19/5.1% | |
| SAH4 | 152/9.4% | 114/75% | 38/25% | |
| CONT5 | 321/19.8% | 303/94.4% | 18/5.6% | |
| DAI6 | 120/7.4% | 99/82.5% | 21/17.5% | |
| Other | 201/12.4% | 169/84.1% | 32/15.9% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Cerebral edema | No | 1517/93.6% | 1370/90.3% | 147/9.7% |
| Yes | 103/6.4% | 47/45.6% | 56/54.4% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Facial bones fracture | No | 981/60.6% | 857/87.4% | 124/12.6% |
| Yes | 639/39.4 | 560/87.6% | 79/12.4 | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Lung contusion | No | 1273/78.6% | 1152/90.5% | 121/9.5% |
| Yes | 347/21.4% | 265/76.4% | 82/23.6% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Hemothorax | No | 1482/91.5% | 1319/89% | 163/11% |
| Yes | 138/8.5% | 98/71% | 40/29% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Pneumothorax | No | 1387/85.6% | 1251/90.2% | 136/9.8% |
| Yes | 233/14.4% | 166/71.2% | 67/28.8% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Abdominal organ injuries | No | 1417/87.5% | 1278/90.2% | 139/9.8% |
| Yes | 203/12.5% | 139/68.5% | 64/31.5% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| GCS category | 13–15 | 893/55.1% | 875/98% | 18/2% |
| 9–12 | 122/7.5% | 113/92.6% | 9/4.4% | |
| ≤ 8 | 605/37.3% | 429/70.9% | 176/29.1% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Shift | 7 am-6:59 pm | 858/53% | 758/88.3% | 100/11.7% |
| 7 pm-6:59 pm | 762/47% | 659/86.5% | 103/13.5% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Known comorbidities | No | 1328/82% | 1167/87.9% | 161/12.1% |
| Yes | 292/18% | 250/85.6% | 42/14.4% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Intubation | No | 848/52.3% | 847/99.9% | 1/0.1% |
| Yes | 772/47.7% | 570/73.8% | 202/26.2% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| VTE7prophylaxis | No | 656/40.5% | 537/81.9% | 119/18.1% |
| Yes | 964/59.5% | 880/91.3% | 84/8.7% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% | |
| Blood transfusion | No | 1013/62.5% | 989/97.6% | 24/2.4% |
| Yes | 607/37.5% | 428/70.5% | 179/29.5% | |
| Total/% | 1620/100% | 1417/87.5% | 203/12.5% |
(1) MVC Motor Vehicle Crash, (2) SDH Subdural Hemorrhage, (3) EDH Epidural Hemorrhage, (4) SAH Subarachnoid Hemorrhage, (5) CONT Hemorrhagic Contusion, (6) DAI Diffuse Axonal Injury, (7) VTE Venous Thromboembolism