Associations of variables with developing an infectious complication
| Variable, n (%) | No IC 4922 (66.2) | IC 2509 (33.8) | P value |
| Number of re-explorations | <0.001 | ||
| 1 | 3503 (71.2) | 1270 (50.6) | |
| 2 | 834 (16.9) | 561 (22.4) | |
| 3 | 278 (5.7) | 265 (10.6) | |
| 4 | 134 (2.7) | 159 (6.3) | |
| ≥5 | 173 (3.5) | 254 (10.1) | |
| Age, ≥55 years | 716 (14.6) | 436 (17.4) | 0.001 |
| Male | 3951 (80.3) | 2048 (81.6) | 0.172 |
| Blunt mechanism | 2023 (41.2) | 1151 (45.9) | <0.001 |
| Interhospital transfer | 733 (14.9) | 349 (13.9) | 0.256 |
| Comorbidities | |||
| Hypertension | 523 (10.6) | 344 (13.7) | <0.001 |
| Alcoholism | 304 (6.2) | 181 (7.2) | 0.087 |
| Respiratory disease | 175 (3.6) | 119 (4.7) | 0.013 |
| Bleeding disorder | 90 (1.8) | 74 (3.0) | 0.002 |
| Diabetes mellitus | 216 (4.4) | 132 (5.3) | 0.092 |
| Current smoker | 812 (16.5) | 481 (19.2) | 0.004 |
| Obesity | 253 (5.1) | 198 (7.9) | <0.001 |
| Cirrhosis | 84 (1.7) | 27 (1.1) | 0.034 |
| Drug abuse or dependence | 274 (5.6) | 159 (6.3) | 0.180 |
| Injury Severity Score | <0.001 | ||
| <16 | 1111 (22.6) | 335 (13.3) | |
| ≥16 | 3811 (77.4) | 2174 (86.7) | |
| Glasgow Coma Scale score | 0.001 | ||
| 13–15 | 3215 (65.3) | 1544 (61.5) | |
| 3–12 | 1707 (34.7) | 965 (38.5) | |
| Abnormal ED vital signs | |||
| Oxygen saturation <95% | 714 (17.0) | 444 (20.7) | <0.001 |
| Temperature <36.4°C or >37.6°C | 3560 (72.3) | 1889 (75.3) | 0.006 |
| Pulse <60 or >100 beats/min | 2864 (59.4) | 1587 (64.4) | <0.001 |
| SBP <90 mm Hg | 1362 (27.7) | 720 (28.7) | 0.352 |
| RR <12 or >16 breaths/min | 3749 (80.6) | 1947 (82.9) | 0.020 |
| In-hospital mortality | 833 (16.9) | 283 (11.3) | <0.001 |
| HLOS (days) | <0.001 | ||
| 1–6 | 1011 (20.5) | 40 (1.6) | |
| >7 | 3911 (79.5) | 2469 (98.4) | |
| ICULOS (days) | <0.001 | ||
| 0 | 291 (5.9) | 56 (2.2) | |
| 1–6 | 2490 (50.6) | 391 (15.6) | |
| >7 | 2141 (43.5) | 2062 (82.2) | |
| Ventilator days | <0.001 | ||
| 0 | 771 (15.7) | 172 (6.9) | |
| 1–5 | 2446 (49.7) | 474 (18.9) | |
| >5 | 1705 (34.6) | 1863 (74.2) |
Bolded p values indicate statistical significance.
ED, emergency department; HLOS, hospital length of stay; IC, infectious complication; ICULOS, intensive care unit length of stay; RR, respiratory rate; SBP, systolic blood pressure.