Patient-reported outcomes - NDI, PCS, MCS and VAS – at baseline and 1 year post-surgery, and change in outcome scores.

<p>Abbreviations: NDI, Neck Disability Index; PCS, Physical Component Summary of the Short Form of the SF-36; MCS, Mental Component Summary of the Short Form of the SF-36; VAS, Visual Analog Scale; SD, Standard Deviation; No., Number of Patients. Baseline means preoperative. Change means the difference between 1 year and baseline values.