Table 2.
Characteristics of patients who were extracted from the Japan Trauma Data Bank (n = 21,535)
| Characteristics | n (%) |
|---|---|
| Sex | |
| Male | 12,903 (59.9) |
| Female | 8,623 (40.0) |
| Data missing | 9 (0.04) |
| Age, years | |
| 0–14 | 1,022 (4.7) |
| 15–24 | 1,780 (8.3) |
| 25–34 | 1,429 (6.6) |
| 35–44 | 1,742 (8.1) |
| 45–54 | 1,871 (8.7) |
| 55–64 | 2,782 (12.9) |
| 65–74 | 3,452 (16.0) |
| 75–84 | 4,328 (20.1) |
| ≥85 | 3,099 (14.4) |
| Data missing | 30 (0.1) |
| Glasgow Coma Scale score | |
| 13–15 | 15,746 (73.1) |
| 9–12 | 1,519 (7.1) |
| 3–8 | 2,353 (10.9) |
| Data missing | 1,917 (8.9) |
| Systolic blood pressure, mmHg | |
| ≥90 | 19,921 (92.5) |
| <90 | 1,548 (7.2) |
| Data missing | 66 (0.3) |
| Respiratory rate, per min | |
| <10 | 193 (0.9) |
| 10–29 | 15,637 (72.6) |
| ≥30 | 2,099 (9.7) |
| Data missing | 3,606 (16.7) |
| Injury Severity Score | |
| <15 | 11,276 (52.4) |
| 15–24 | 5,648 (26.2) |
| 25–44 | 4,081 (19.0) |
| 45–75 | 516 (2.4) |
| Data missing | 14 (0.1) |
| Intent | |
| Unintentional | 19,784 (91.9) |
| Self‐inflicted | 917 (4.3) |
| Violence | 223 (1.0) |
| Undetermined | 407 (1.9) |
| Data missing | 204 (0.9) |
| Injury mechanism | |
| Fall | 11,277 (52.4) |
| Traffic | 7,658 (35.6) |
| Other blunt | 1,325 (6.2) |
| Penetrating | 405 (1.9) |
| Burn | 352 (1.6) |
| Data missing | 518 (2.4) |
| Survival | |
| Alive | 18,896 (87.7) |
| Dead | 1,680 (7.8) |
| Data missing | 959 (4.5) |