Table 2 Subgroup analyses of in-hospital mortality rates between propensity score-matched groups

 Automobile crash

18.0

(135/752)

17.5

(132/756)

.80

 Motorcycle crash

19.1

(116/608)

19.7

(124/631)

.80

 Bicycle crash

30.7

(83/270)

29.2

(79/271)

.69

 Pedestrian traffic accident

42.9

(124/289)

41.8

(123/294)

.79

 Other vehicle

41.5

(17/41)

25.0

(10/40)

.12

 Fall from high place or Stairs

21.1

(293/1391)

26.6

(364/1366)

.001

 Machine injury

22.0

(11/50)

23.4

(11/47)

.87

 Falling object or Explosion

14.3

(14/98)

19.1

(17/89)

.38

 Compression injury

16.1

(25/155)

31.5

(52/165)

.001

 Train

31.3

(5/16)

46.7

(7/15)

.38

 Sports

8.8

(8/91)

2.2

(2/91)

.05

 Other blunt injury

25.0

(22/88)

22.4

(22/98)

.68

 Penetrating

19.4

(12/62)

29.1

(16/55)

.22

 missing

24.6

(17/69)

24.2

(15/62)

.95

 Head

32.6

(625/1916)

32.0

(609/1902)

.69

 Face

22.2

(18/81)

34.2

(26/76)

.10

 Neck

20.8

(5/24)

33.3

(7/21)

.34

 Chest

23.4

(514/2197)

29.1

(627/2153)

<.001

 Abdomen

31.3

(163/521)

31.6

(162/512)

.90

 Spine

12.9

(111/862)

14.1

(126/894)

.46

 Extremity

23.7

(271/1144)

33.9

(370/1092)

<.001

 Skin

14.3

(1/7)

37.5

(3/8)

.31

 Tertiary

22.2

(877/3951)

24.7

(937/3798)

.01

 Secondary

17.2

(5/29)

20.3

(37/182)

.70