Table 4.

Low back and leg pain scores 24 months after surgery

Pain score after surgery	Local bone graft	ICBG	Statistical analysis
Low back pain
Visual analog scale (VAS)	1.8 ± 0.6	2.2 ± 0.7	N.S.
Japanese orthopedic association score (JOAS)	2.4 ± 0.8	2.5 ± 0.7	N.S.
Oswestry Disability Index (ODI)	22 ± 5	25 ± 4	N.S.
Leg pain
Visual analog scale (VAS)	1.5 ± 0.6	2.0 ± 0.8	N.S.
Japanese orthopedic association score (JOAS)	2.4 ± 0.5	2.3 ± 0.6	N.S.