Table 2.

Pre- and postoperative Visual Analog Scale and Neck Disability Index

Preoperative		Postoperative 6 weeks		Postoperative 6 months		Postoperative 1 year		Postoperative 2 years
VAS	NDI	VAS	NDI	VAS	NDI	VAS	NDI	VAS	NDI
PA
7.69	71.22	3.99	42.44	1.95	31.05	2.01	29.76	1.89	24.34
AA
8.01	74.12	4.01	39.34	3.19	32.83	1.89	19.97	1.96	21.32

VAS - Visual Analog Scale; NDI - Neck Disability Index; PA - Posterior approach; AA - Anterior approach