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Table 2 Patients classified by SI calculated at ED admission and the presence of TBI: demographics, injury mechanism and severities as well as outcome parameters. Continuous variables are presented as mean ± 95% confidence interval; categorical variables are presented as absolute number and percentage
| Class I | Class II | Class III | Class IV | |||||
|---|---|---|---|---|---|---|---|---|
| SI <0.6 | SI ≥0.6 to <1 | SI ≥1 to <1.4 | SI ≥ 1.4 | |||||
| Non-TBI | TBI | Non-TBI | TBI | Non-TBI | TBI | Non-TBI | TBI | |
| Demographics | ||||||||
| n (total, %) | 6949 (28.8) | 5177 (30.9) | 12,780 (53.0) | 7861 (46.9) | 2015 (8.4) | 1741 (10.4) | 800 (3.3) | 839 (5.0) |
| Male (n, %) | 5324 (77) | 3691 (72) | 9219 (72) | 5678 (72) | 1423 (71) | 1255 (73) | 592 (74) | 613 (72) |
| Age (years; mean ± CI) | 48.5 ± 0.5 | 55 ± 0.6 | 42 ± 0.3 | 47 ± 0.5 | 44 ± 0.8 | 46 ± 1.0 | 46 ± 1.3 | 45 ± 1.4 |
| Blunt trauma (n, %) | 6367 (96) | 4877 (97) | 11,405 (93.1) | 7428 (97) | 1765 (90) | 1605 (95) | 702 (91) | 768 (94) |
| Injury Severity | ||||||||
| ISS (points; mean ± CI) | 13.3 ± 0.2 | 24.9 ± 0.3 | 15.8 ± 0.2 | 28.4 ± 0.3 | 23.4 ± 0.6 | 36.2 ± 0.7 | 30.6 ± 1.0 | 43.0 ± 1.1 |
| NISS (points; mean ± CI) | 16.4 ± 0.2 | 33.6 ± 0.4 | 19.4 ± 0.2 | 35.7 ± 0.3 | 28.7 ± 0.6 | 42.9 ± 0.8 | 36.7 ± 1.1 | 49.0 ± 1.1 |
| RISC (points; mean ± CI) | 4.3 ± 0.2 | 23.7 ± 0.7 | 4.5 ± 0.2 | 26.4 ± 0.6 | 11.1 ± 0.8 | 38.3 ± 1.6 | 23.9 ± 1.9 | 52.1 ± 2.4 |
| AIS Thorax ≥3 points (n; %) | 2669 (38) | 1461 (28) | 5554 (44) | 3182 (40) | 1198 (60) | 1021 (59) | 541 (68) | 585 (70) |
| AIS Abdomen ≥3 points (n; %) | 674 (10) | 179 (3) | 1985 (15) | 661 (8) | 606 (30) | 357 (21) | 355 (44) | 286 (34) |
| AIS Pelvis/Extremities ≥3 points (n; %) | 1840 (27) | 541 (10) | 4554 (36) | 1569 (20) | 1045 (52) | 657 (38) | 513 (64) | 410 (49) |
| Outcome | ||||||||
| Mortality (n; %) | 154 (2.2) | 1057 (20.4) | 373 (2.9) | 1523 (19.4) | 204 (10.1) | 637 (36.6) | 196 (24.5) | 433 (51.6) |
| Hospital LOS (days; mean ± CI) | 16.6 ± 0.4 | 18.3 ± 0.5 | 20.4 ± 0.4 | 21.0 ± 0.5 | 30.8 ± 1.3 | 23.0 ± 1.2 | 31.7 ± 2.2 | 22.2 ± 1.9 |
| ICU LOS (days; mean ± CI) | 4.2 ± 0.2 | 9.7 ± 0.3 | 6.1 ± 0.2 | 11.8 ± 0.3 | 12.2 ± 0.7 | 14.7 ± 0.7 | 15.6 ± 1.2 | 14.6 ± 1.3 |
| Ventilatior days (days; mean ± CI) | 1.8 ± 0.1 | 6.4 ± 0.3 | 3.1 ± 0.1 | 8.1 ± 0.2 | 7.5 ± 0.6 | 14.8 ± 0.6 | 10.8 ± 1.0 | 11.5 ± 1.1 |
| MOF (n; %) | 220 (4) | 676 (15) | 670 (6) | 1393 (20) | 302 (17) | 483 (32) | 186 (28) | 273 (41) |
| Sepsis (n; %) | 176 (3) | 345 (8) | 515 (5) | 680 (10) | 226 (13) | 214 (14) | 143 (21) | 119 (17) |
