Table 5.

Comparisons of pre-and post-operative scores for the visual analogue scale (VAS), Oswestry disability index (ODI), and detailed VAS for low back pain while in motion, standing, and sitting in groups A and B

		Group A	Group B	p value
Nakai score		2.59 ± 0.50	2.07 ± 0.78	p = 0.008
Low back pain (LBP)	Pre-op	48.9 ± 27.5	63.2 ± 22.6	p = 0.046
	Post-op	14.1 ± 19.4	23.8 ± 20.9	NS (p = 0.096)
Lower extremity pain	Pre-op	68.2 ± 24.8	66.9 ± 25.3	NS
	Post-op	13.7 ± 19.2	20.9 ± 23.3	NS
Lower extremity numbness	Pre-op	62.8 ± 27.4	64.3 ± 32.0	NS
	Post-op	11.7 ± 17.3	20.2 ± 26.7	NS
ODI	Pre-op	41.3 ± 15.4	47.4 ± 18.7	NS
	Post-op	17.1 ± 13.1	22.0 ± 15.7	NS
LBP while in motion	Pre-op	49.1 ± 35.2	55.6 ± 32.2	NS
	Post-op	19.2 ± 26.0	22.6 ± 23.9	NS
LBP while standing	Pre-op	63.8 ± 30.9	73.0 ± 25.0	NS
	Post-op	11.9 ± 17.6	25.8 ± 26.7	p = 0.039
LBP while sitting	Pre-op	37.0 ± 27.4	43.9 ± 27.2	NS
	Post-op	12.3 ± 17.3	16.1 ± 19.4	NS

Nakai score: 3 = excellent to 0 = poor; VAS scores: 0–100 mm

Values are expressed as the mean ± standard deviation. NS is non-significant at p > 0.05