Table 4.
Treatment and Progress.
| Lower N=139 | Mid N=312 | p-value | |
|---|---|---|---|
| Surgical treatment | 123 (88%) | 254 (81%) | 0.061 |
| Conversion to surgery | 25 (18%) | 43 (14%) | 0.25 |
| Surgical procedure | 0.47 | ||
| Posterior | 110 (90%) | 218 (86%) | |
| Others | 5 (4%) | 13 (5%) | |
| Anterior | 7 (6%) | 23 (9%) | |
| Others | 5 (4%) | 13 (5%) | |
| Decompression | 43 (35%) | 117 (46%) | 0.047 |
| Intraoperative complications | 2 (1%) | 9 (3%) | 0.52 |
| Dura tear | 1 | 4 | |
| Neurological | 1 | 3 | |
| VA injury | 0 | 1 | |
| Cardiac arrest due to bleeding | 0 | 1 | |
| Complications | 57 (41%) | 132 (42%) | 0.80 |
| Death | 6 (4%) | 20 (6%) | 0.38 |
| Deep SSI | 1 (1%) | 4 (1%) | >0.99 |
| Pneumonia | 19 (14%) | 46 (15%) | 0.76 |
| Respiratory failure | 12 (9%) | 52 (17%) | 0.024 |
| Tracheostomy | 3 (2%) | 17 (5%) | 0.12 |
| Dysphagia | 15 (11%) | 45 (14%) | 0.29 |
| DVT | 5 (4%) | 2 (1%) | 0.031 |
| PE | 0 (0%) | 1 (0%) | >0.99 |
| Ambulation, 6 months | 0.54 | ||
| Walk w/o assistance | 76 (72%) | 154 (66%) | |
| Walk w/ assistance | 10 (10%) | 30 (13%) | |
| Nonambulatory | 19 (18%) | 49 (21%) | |
| Unknown | 34 | 79 | |
| AIS, 6 months | 0.76 | ||
| A | 8 (12%) | 15 (10%) | |
| B | 3 (4%) | 8 (5%) | |
| C | 9 (13%) | 18 (12%) | |
| D | 24 (36%) | 66 (45%) | |
| E | 23 (34%) | 41 (28%) | |
| Unknown | 72 | 164 |
VA, vertebral artery; SSI, surgical site infection; DVT, deep vein thrombosis; PE, pulmonary embolism; AIS, ASIA (American Spinal Injury Association) impairment scale