Clinical outcome measures.
| Outcome Measure | Preoperation | Final Follow-up | P value |
| VAS of neck pain | 4.6 ± 4.0 | 1.3 ± 1.8 | 0.021 |
| VAS of arm pain | 4.3 ± 3.6 | 1.0 ± 1.7 | 0.026 |
| Neck Disability Index | 8.2 ± 7.4 | 3.9 ± 3.0 | 0.034 |
| Modified Japanese Orthopedic Association score | 13.8 ± 1.7 | 15.2 ± 1.3 | 0.041 |
Abbreviation: VAS, visual analog scale.
Note: Values are presented as mean ± SD. Boldface type indicates statistical significance.