Table 2 Baseline characteristics of patients in the total study cohort

Age (years)—median [IQR]²

1.8 [0.3–6.7]

1.9 [0.3–8.4]

Age < 1 year—no. (%)

238 (41.0)

228 (40.5)

Male gender—no. (%)

323 (55.6)

324 (57.6)

Weight (kg)—median [IQR]²

11.1 [5.3–21.0]

12.0 [5.1–25.0]

STRONGkids risk level—no. (%)¹

 Medium (1–3)

530 (91.3)

511 (90.9)

 High (4, 5)

50 (8.6)

51 (9.0)

PIM2 calc. risk of death (%)—median [IQR]²

0.06 [0.02–0.21]

0.06 [0.02–0.017]

Emergency admission—no. (%)

272 (46.9)

271 (48.2)

 Leuven

371 (63.9)

372 (66.1)

 Rotterdam

173 (29.8)

161 (28.6)

 Edmonton

36 (6.2)

29 (5.1)

  Abdominal

25 (4.3)

27 (4.8)

  Burns

3 (0.5)

5 (0.8)

  Cardiac

266 (45.8)

255 (45.3)

  Neurosurgery-traumatic brain injury

59 (10.1)

46 (8.1)

  Thoracic

24 (4.1)

20 (3.5)

  Transplantation

7 (1.2)

15 (2.6)

  Orthopedic surgery-trauma

27 (4.6)

26 (4.6)

  Others

11 (1.9)

19 (3.3)

  Cardiac

22 (3.7)

22 (3.9)

  Gastrointestinal-hepatic

2 (0.3)

3 (0.5)

  Oncologic-hematologic

4 (0.6)

7 (1.2)

  Neurologic

41 (7.0)

36 (6.4)

  Respiratory

54 (9.3)

52 (9.2)

  Others

35 (6.0)

29 (5.1)

 Need for hemodynamic assist device

17 (0.0)

23 (0.0)

 Presence of infection

212 (36.5)

193 (34.3)