Table 2.

Outcome measurement	Preoperative
	Group B	Group A	p
VAS back pain	60 ± 20	61 ± 21	0.80
VAS leg pain	34 ± 28	32 ± 26	0.72
EQ-5D	0.4 ± 0.3	0.3 ± 0.3	0.17
SF-36 PCS	40.0 ± 13.5	38.9 ± 11.5	0.65
SF-36 MCS	33.2 ± 9.1	33.0 ± 7.6	0.94
ODI	40 ± 13	43 ± 12	0.23

Outcome measurement results preoperatively for group A and group B. Abbreviations: VAS = visual analogue scale; EQ-5D = European Quality of Life 5D; SF-36 PCS = 36-short form health survey, physical component summary; SF-36 MCS = 36-short form health survey, mental component summary; ODI = Oswestry disability index.