Table 1. Cohort demographics split by AIS (American Spinal Injury Association [ASIA] Impairment Scale) improvement.
| AIS improve. N/A(n = 15) | AIS improve. NO(n = 61) | AIS improve. YES(n = 42) | Univariate p-value | |
|---|---|---|---|---|
| Age (years) | 0.12 | |||
| Mean (SD) | 46.0 (17.6) | 45.3 (19.1) | 51.4 (19.7) | |
| Median [min, max] | 45.5 [19.0, 87.0] | 47.0 [18.0, 82.0] | 55.0 [18.0, 86.0] | |
| Missing | 1 (6.7%) | 2 (3.3%) | 1 (2.4%) | |
| AIS admission | 0.013 | |||
| A | 1 (6.7%) | 33 (54.1%) | 18 (42.9%) | |
| B | 0 (0%) | 5 (8.2%) | 8 (19.0%) | |
| C | 0 (0%) | 5 (8.2%) | 11 (26.2%) | |
| D | 0 (0%) | 14 (23.0%) | 5 (11.9%) | |
| E | 0 (0%) | 4 (6.6%) | 0 (0%) | |
| Missing | 14 (93.3%) | 0 (0%) | 0 (0%) | |
| AIS discharge | <0.0001 | |||
| A | 0 (0%) | 35 (57.4%) | 0 (0%) | |
| B | 0 (0%) | 5 (8.2%) | 5 (11.9%) | |
| C | 1 (6.7%) | 4 (6.6%) | 15 (35.7%) | |
| D | 0 (0%) | 14 (23.0%) | 17 (40.5%) | |
| E | 1 (6.7%) | 2 (3.3%) | 5 (11.9%) | |
| Missing | 13 (86.7%) | 1 (1.6%) | 0 (0%) | |
| Surgery duration (min) | 0.66 | |||
| Mean (SD) | 433 (167) | 392 (146) | 407 (181) | |
| Median [min, max] | 432 [121, 725] | 389 [120, 728] | 343 [151, 950] | |
| Missing | 1 (6.7%) | 2 (3.3%) | 1 (2.4%) | |
| Surgery to discharge (days) | 0.33 | |||
| Mean (SD) | 9.50 (2.12) | 18.8 (20.6) | 23.4 (23.8) | |
| Median [min, max] | 9.50 [8.00, 11.0] | 11.0 [1.00, 128] | 14.5 [4.00, 120] | |
| Missing | 13 (86.7%) | 4 (6.6%) | 2 (4.8%) | |
| Dichotomized neurological level of injury at admission | 0.054 | |||
| Cervical | 2.00 (13.3%) | 36 (59%) | 33 (78.6%) | |
| Non-cervical | 13.00 (86.7%) | 25 (41%) | 9 (21.4%) |