Table 1 Comparison of demographic characteristics and variables by age groups

Age, years (median IQR)

13 (8–17)

0 (0–0)

3 (2–4)

9 (7–-11)

16 (15–17)

<.001

Male, n (%)

12,905 (73)

219 (66)

1398 (64)

4264 (72)

7024 (76)

<.001

 Head injury with AIS ≥ 3

6010 (34)

266 (81)

856 (39)

1987 (33)

2901 (31)

<.001

 Facial injury with AIS ≥ 3

173 (1)

0

12 (0.6)

43 (0.7)

118 (1)

<.001

 Neck injury with AIS ≥ 3

20 (0.1)

0

3 (0.1)

3 (0.1)

14 (0.2)

0.291

 Chest injury with AIS ≥ 3

3339 (19)

10 (3)

349 (16)

862 (14)

2118 (23)

<.001

 Abdominal and pelvic injury with AIS ≥ 3

1435 (8)

3 (0.9)

86 (4)

468 (8)

788 (8)

<.001

 Spinal injury with AIS ≥ 3

744 (4)

1 (0.3)

26 (1)

85 (1)

632 (7)

<.001

 Upper extremity injury with AIS ≥ 3

1610 (9)

0

213 (10)

846 (14)

551 (6)

<.001

 Lower extremity injury with AIS ≥ 3

2733 (15)

13 (4)

233 (11)

828 (14)

1659 (18)

<.001

Injury Severity Score, (median IQR)

10 (6–17)

16 (9–17)

9 (5–17)

9 (8–16)

10 (6–19)

<.001

Revised Trauma Score, (median IQR)

7.84 (7.55–7.84)

7.55 (6.61–7.55)

7.55 (6.90–7.84)

7.84 (7.55–7.84)

7.84 (7.55–7.84)

<.001

Survival probability, (median IQR)

0.99 (0.98–0.99)

0.98 (0.95–0.99)

0.99 (0.98–0.99)

0.99 (0.99–0.99)

0.99 (0.98–0.99)

<.001

 Survival probability 0.96–1.00, n (%)

15,258 (86)

238 (72)

1882 (86)

5325 (90)

7813 (84)

<.001

 Survival probability 0.91–0.95, n (%)

937 (5)

48 (15)

108 (5)

270 (5)

511 (6)

<.001

 Survival probability 0.76–0.90, n (%)

844 (5)

29 (9)

116 (5)

214 (4)

485 (5)

<.001

 Survival probability 0.51–0.75, n (%)

344 (2)

6 (2)

34 (2)

72 (1)

232 (3)

<.001

 Survival probability 0.26–0.50, n (%)

190 (1)

5 (2)

21 (1)

30 (0.5)

134 (1)

<.001

 Survival probability 0.00–0.25, n (%)

172 (1)

4 (1)

22 (1)

39 (0.7)

107 (1)

0.022

Mortality, n (%)

378 (2.1)

14 (4.2)

43 (2.0)

73 (1.2)

248 (2.7)

<.001