Table 1.
Baseline characteristics after propensity score matching.
| N (%) | |||
|---|---|---|---|
| Demographics | ASIA A (n=225) | ASIA B (n=225) | P |
| Age, years | |||
| Mean (SD) | 46.3 (15.5) | 45.6 (15.3) | 0.657 |
| Median (IQR) | 46 (33–55) | 45 (35.5–60) | 0.883 |
| Sex | 0.886 | ||
| Male | 197 (87.6) | 198 (88.0) | |
| Female | 28 (12.4) | 27 (12.0) | |
| Dislocation | 86 (38.2) | 79 (35.1) | 0.493 |
| Injury factors | 0.107 | ||
| High-energy injury | 192 (85.3) | 179 (79.6) | |
| Low-energy injury | 33 (14.7) | 46 (20.4) | |
| Fracture level | 0.126 | ||
| Upper cervical spine (C1–C4) | 86 (38.2) | 102 (45.3) | |
| Lower cervical spine (C5–C7) | 139 (61.8) | 123 (54.7) | |
| Comorbidity | |||
| Chest injury | 35 (15.6) | 49 (21.8) | 0.090 |
| Fractures in other parts | 37 (16.4) | 23 (10.2) | 0.052 |
| Hypertension | 8 (3.6) | 9 (4.0) | 0.805 |
| Diabetes | 7 (3.1) | 8 (3.6) | 0.793 |
| Surgical treatment | 0.209 | ||
| Yes | 200 (88.9) | 191 (84.9) | |
| No | 25 (11.1) | 34 (15.1) | |
| Operation timing | 0.357 | ||
| Nonsurgery | 25 (11.1) | 34 (15.1) | |
| Early term | 60 (26.7) | 57 (25.3) | |
| Medium term | 101 (44.9) | 87 (38.7) | |
| Later term | 39 (17.3) | 47 (20.9) | |
| Complications | |||
| Pneumonia | 55 (24.4) | 46 (20.4) | 0.309 |
| Respiratory failure | 9 (4.0) | 13 (5.8) | 0.382 |
| Deep veinous thrombosis | 1 (0.4) | 2 (0.9) | 0.562 |
| Decubitus | 3 (1.3) | 8 (3.6) | 0.127 |
| Urinary tract infection | 10 (4.4) | 6 (2.7) | 0.309 |
ASIA, American Spinal Injury Association impairment scale; IQR, interquartile range.