Table 3. Patient-reported outcomes - NDI, PCS, MCS and VAS – at baseline and 1 year post-surgery, and change in outcome scores.

Patient-reported outcomes	Baseline			1 Year			Change
	Mean	SD	No.	Mean	SD	No.	Mean	SD	No.
NDI	29.24	13.94	30	14.82	11.81	30	−14.41	12.09	30
VAS	5.06	2.64	30	1.72	1.96	30	−3.34	2.67	30
PCS	36.98	7.13	29	44.22	9.71	29	7.23	9.01	29
MCS	47.82	7.93	29	48.20	7.54	29	0.38	8.02	29

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.