Neurologic status: classification of ASIA score changes, n (%).
| Operative Status | Worsened | Stable | Improved |
| Operative (n = 163) | 1 (0.6) | 137 (84.0) | 25 (15.3) |
| Nonoperative (n = 89) | 1 (1.1) | 85 (95.5) | 3 (3.4) |
| Total (n = 252) | 2 (0.8) | 222 (88.1) | 28 (11.1) |
Abbreviation: ASIA, American Spinal Injury Association.