TABLE 1.
Baseline Patient Characteristics.
| Age (yr) | 52.42 ± 10.17 |
| Female sex | 67 (34.72%) |
| Region | |
| North America | 99 (51.30%) |
| Asia-Pacific | 38 (19.69%) |
| Europe | 37 (19.17%) |
| Latin America | 19 (9.84%) |
| Race | |
| Caucasian | 140 (72.54%) |
| East Asian | 38 (19.69%) |
| African-American | 8 (4.15%) |
| Other | 7 (3.63%) |
| Current smoker | 48 (24.87%) |
| Diagnosis | |
| Disc herniation | 144 (74.61%) |
| Spondylosis | 131 (67.88%) |
| OPLL | 40 (20.73%) |
| HLF | 34 (17.62%) |
| Subluxation | 7 (3.63%) |
| Congenital stenosis | 4 (2.07%) |
| Symptom duration (mo) | 26.72 ± 35.85 |
| mJOA | 15.76 ± 0.77 |
| 15 | 86 (44.56%) |
| 16 | 68 (35.23%) |
| 17 | 39 (20.21%) |
| Nurick | 2.31 ± 0.81 |
| 0 | 3 (1.55%) |
| 1 | 24 (12.44%) |
| 2 | 88 (45.60%) |
| 3 | 78 (40.41%) |
| 4 | 0 |
| 5 | 0 |
| NDI (n = 158) | 31.34 ± 17.32 |
| SF-36v2 (n = 185) | |
| PCS score | 39.74 ± 8.89 |
| MCS score | 42.72 ± 13.16 |
| SF-6D (n = 182) | 0.60 ± 0.11 |