Table 2.
Characteristics and prehospital information of the study participants
| Parameters | Total | JCS level 1 digit | JCS level 2 digits | JCS level 3 digits |
| Male, n (%) | 104 950 (63.7) | 78 187 (62.1) | 9254 (68.2) | 17 509 (69.2) |
| Age, median (IQR) | 61 (39–76) | 62 (41–78) | 55 (34–71) | 58 (37–73) |
| <40 years old, n (%) | 41 218 (25.0) | 29 852 (23.7) | 4177 (30.8) | 7189 (28.4) |
| 40–49 | 17 827 (10.8) | 13 259 (10.5) | 1652 (12.2) | 2916 (11.5) |
| 50–59 | 19 256 (11.7) | 14 466 (11.5) | 1724 (12.7) | 3066 (12.1) |
| 60–69 | 26 299 (16.0) | 19 679 (15.6) | 2228 (16.4) | 4392 (17.4) |
| 70–79 | 28 063 (17.0) | 21 627 (17.2) | 2074 (15.3) | 4362 (17.2) |
| ≥80 | 32 060 (19.5) | 26 981 (21.4) | 1706 (12.6) | 3373 (13.3) |
| Type of injury, n (%) | ||||
| Blunt | 158 113 (96.0) | 120 923 (96.1) | 12 720 (93.8) | 24 470 (96.7) |
| Penetrating | 6610 (4.0) | 4941 (3.9) | 841 (6.2) | 828 (3.3) |
| RR, median (IQR) | 20 (18–24) | 20 (18–24) | 23 (18–25) | 21 (18–26) |
| ≤9, n (%) | 1261 (0.8) | 85 (0.1) | 15 (0.1) | 1161 (4.6) |
| 10–29 | 123 254 (74.8) | 100 425 (79.8) | 9741 (71.8) | 13 088 (51.7) |
| ≥30 | 18 548 (11.3) | 12 202 (9.7) | 2410 (17.8) | 3936 (15.6) |
| Unknown | 5857 (3.6) | 13 152 (10.5) | 1395 (10.3) | 7113 (28.1) |
| SBP, median (IQR) | 136 (115–159) | 138 (118–160) | 128 (106–150) | 132 (108–160) |
| ≥200, n (%) | 5858 (3.6) | 4336 (3.4) | 407 (3.0) | 1115 (4.4) |
| 140–199 | 63 191 (38.4) | 53 115 (42.2) | 4133 (30.5) | 5943 (23.5) |
| 90–139 | 70 914 (43.1) | 57 241 (45.5) | 6281 (46.3) | 7392 (29.2) |
| <90 | 8655 (5.3) | 5499 (4.4) | 14 00 0 (10.3) | 1756 (6.9) |
| Unknown | 16 105 (9.8) | 5673 (4.5) | 1340 (9.9) | 9092 (35.9) |
bpm, breaths per minute; JCS, Japan Coma Scale; RR, respiratory rate (bpm); SBP, systolic blood pressure (mm Hg).