Table 1 Characteristic of blunt spleen injury patients who diagnosed with contrast enhanced CT (N = 147)

Age

36.7 ± 19.0 (16–91)

Gender (male/female)

105 (71.4%)/ 42 (28.6%)

Mechanism

 Motor vehicle collision

9 (6.1%)

 Fall

15 (10.2%)

 auto vs. pedestrian collision

4 (2.7%)

 motorcycle collision

117 (79.6%)

 Other

2 (1.4%)

Injury severity score

28.5 ± 10.9 (4–50)

Revised Trauma Score

7.18 ± 1.20 (0.00-7.84)

Head Injury (AIS^a ≥ 3)

35 (23.8%)

Chest Injury (AIS^a ≥ 3)

112 (76.2%)

Abdomen Injury (AIS^a ≥ 3)

103 (70.1%)

Extremities Injury (AIS^a ≥ 3)

41 (27.9%)

Spleen Injury (AAST-OIS^b 2018 grade)

 1

19 (12.9%)

 2

32 (21.8%)

 3

17 (11.6%)

 4

62 (42.2%)

 5

17 (11.6%)

Initial treatment intention

 NOM-OBS^c

60 (40.8%)

 TAE^d

73 (49.7%)

 Splenectomy

14 (9.5%)

Mortality

10 (6.8%)

Bleeding related mortality

7 (4.7%)

Severe complication^e

32 (21.9%)

NOM failure^f

4/132 (3.0%)

NOM-OBS^g failure

4/60 (6.7%)

TAE failure^h

3/73 (4.1%)

Length of hospital stay

13.4 ± 10.8 (0–72)

Length of ICU stay

5.8 ± 6.5 (0–37)