Table 1.

Paired comparison of VAS scale in measured times

Measured times	Group	Mean VAS	p-value
Before surgery	OZG	79.00	1.0
	LDG	79.00
First month	OZG	31.50	0.2
	LDG	37.50
Third month	OZG	25.50	0.2
	LDG	31.50
Sixth month	OZG	28.50	0.2
	LDG	38.50
Twelfth month	OZG	30.00	0.4
	LDG	35.50

Abbreviations: VAS, visual analogue scale; OZG, Ozone Injection Group; LDG, Laser Decompression Group.