Patient characteristics stratified by age groups
| A1 (0–4 years) n=8 | A2 (5–14 years) n=59 | P value | A3 (15–17 years) n=48 | P value | |
| Male gender, n (%) | 3 (37.5) | 40 (67.8) | 0.124 | 35 (72.9) | 0.565 |
| OIS renal injury grade | 2 (2; 3) | 4 (3; 4) | 0.008 | 3 (2; 4) | 0.035 |
| ISS | 18 (4; 47) | 17 (16; 25) | 0.845 | 26 (16; 36) | 0.048 |
| TRISS 09 Ps | 0.99 (0.84; 0.99) | 0.99 (0.99; 0.99) | 0.815 | 0.97 (0.92; 0.99) | <0.001 |
| Transfused, n (%) | 3 (37.5) | 6 (10.2) | 0.068 | 4 (8.3) | 1.000 |
| ED surgery, n (%) | 0 (0.0) | 0 (0.0) | 1.000 | 3 (6.3) | 0.087 |
| Intubated, n (%) | 4 (50.0) | 9 (15.3) | 0.040 | 13 (27.1) | 0.154 |
| Mortality, n (%) | 1 (12.5) | 2 (3.4) | 0.321 | 4 (8.3) | 0.405 |
| Isolated injury, n (%) | 4 (50.0) | 18 (30.5) | 0.423 | 14 (29.2) | 0.880 |
| Concomitant IAI, n (%) | 0 (0.0) | 15 (25.4) | 0.183 | 4 (8.3) | 0.024 |
| Concomitant EAI, n (%) | 4 (50.0) | 26 (44.1) | 1.000 | 30 (62.5) | 0.058 |
| LOS ICU, days | 3 (0; 10) | 2 (1; 3) | 0.469 | 2 (1; 5) | 0.085 |
| LOS hospital, days | 5 (1; 14) | 5 (4; 7) | 0.733 | 5 (3; 9) | 0.977 |
Intubated refers to intubated prehospital or in the emergency department. Isolated injury refers to isolated renal injury. Values are median and interquartiles when not stated otherwise. No patients under the age of 1 were identified.
A1, A2, A3, age groups 1–3; EAI, extra-abdominal injury; ED, emergency department; IAI, intra-abdominal injury; ICU, intensive care unit; ISS, Injury Severity Score; LOS, length of stay; OIS, Organ Injury Scale; TRISS 09 Ps, Trauma and Injury Severity Score 2009 revision Probability of survival.