Table 1. Baseline characteristics of study subjects (n=1,284).

Characteristics	Number (%) or mean ± SD
Age (years)	58.3±15.2
Sex, male	967 (75.3)
Type of injury
Traffic accidents	690 (53.7)
Fall down	344 (26.8)
Slip down	77 (6.0)
Object collision	126 (9.8)
Machine crash	26 (2.0)
Assault	21 (1.6)
ISS	18.9±9.5
ISS <9	535 (41.7)
ISS ≥9	749 (58.3)
Chest AIS	3.04±0.50
1	1 (0.1)
2	113 (8.8)
3	1,021 (79.5)
4	129 (10.0)
5	20 (1.6)

SD, standard deviation; ISS, injury severity score; AIS, abbreviated injury score.