Table 1 Descriptive patient characteristics of the study population

Injury grade, n (%)

–

 1

7 (2.5%)

7

–

 2

50 (17.9%)

50

–

 3

93 (33.2%)

93

–

 4

119 (42.5%)

–

119

 5

11 (3.9%)

–

11

Age [years], mean (SD)

38.1 (18.0)

38.1 (16.9)

38.2 (19.3)

0.945

Male sex, n (%)

244 (87.1%)

129 (86.0%)

115 (88.5%)

0.594

Inpatient stay [days], mean (SD)

8.5 (5.1)

6.6 (3.9)

10.6 (5.4)

 < 0.001

Intervention (overall), n (%)

101 (36.1%)

7 (4.7%)

94 (72.3%)

 < 0.001

Intervention (trauma day), n (%)

59 (21.1%)

0 (0.0%)

59 (45.4%)

 < 0.001

Severity of intervention (trauma day)

–

 Minimal-invasive

48 (81.4%)

–

48 (81.4%)

 Open

11 (18.6%)

–

11 (18.6%)

Clinical progress

35 (12.5%)

3 (2.0%)

32 (24.6%)

 < 0.001

Severity of intervention (clinical progress)

0.536

 Minimal-invasive

23 (65.7%)

3 (100.0%)

20 (62.5%)

 Open

12 (34.3%)

0 (0.0%)

12 (37.5%)

Time of clinical progress after trauma [days], mean (SD)

5.3 (4.1)

6.7 (3.5)

5.2 (4.2)

0.561

Intervention (CT control 48 h), n (%)

16 (5.7%)

5 (3.3%)

11 (8.5%)

0.075

Severity of intervention (CT 48 h)

0.516

 Minimal-invasive

11 (73.3%)

4 (100.0%)

7 (63.6%)

 Open

4 (26.7%)

0 (0.0%)

4 (36.4%)

Creatinine [mg/dl] at trauma day, mean (SD)

1.01 (0.22)

0.98 (0.21)

1.05 (0.24)

0.021

Hb [mg/dl] at trauma day, mean (SD)

121.4 (23.3)

131.6 (17.6)

109.6 (23.6)

 < 0.001

Macrohaematuria at trauma, n (%)

148 (52.9%)

75 (50.0%)

73 (56.2%)

0.338