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| Level of injury | Severity of injury, n (%) | P-value | ||
| Complete | Incomplete | Total | ||
| Cervical | <.001 | |||
| Yes | 375 (21.8) | 1345 (78.2) | 1720 (44.9) | |
| No | 303 (14.3) | 1809 (85.7) | 2112 (55.1) | |
| Thoracic | <.001 | |||
| Yes | 185 (14.6) | 1079 (85.4) | 1264 (33.0) | |
| No | 493 (19.2) | 2075 (80.8) | 2568 (67.0) | |
| Lumbar | 0.016 | |||
| Yes | 141 (15.0) | 800 (85.0) | 941 (24.6) | |
| No | 537 (18.6) | 2354 (81.4) | 2891 (75.4) | |
| Total | 678 (17.7) | 3154 (82.3) | 3832 (100.0) | |
