Table 2.

Comparison of the outcomes of visual analog scale (VAS) and Oswestry Disability Index (ODI) scores in the groups. Both groups exhibited significant reduction in pain over time.

	Mean	Comparison		P value
Visual analog scale (VAS)	Preop: 7.20 3 months: 2.70 12 months: 1.53 24 months: 0.95	Preop: 3 months Preop: 12 months Preop: 24 months 3–12 months	3–24 months 12–24 months	0.000
Oswestry Disability Index (ODI)	Preop: 65.90 3 months: 22.80 12 months: 11.10 24 months: 4.94	Preop: 3 months Preop: 12 months Preop: 24 months 3–12 months	3–24 months 12–24 months	0.000

Friedman test (mean and P value); Wilcoxon Signed Ranks Test.