Table 3

Mean (SD) change in patient-reported outcomes.

Patient-Reported Outcomes	n	Mean (SD) Change Compared With Preoperation	P
ODI
2 wk	41	3.7 (22.8)	0.307
6 wk	48	−8.7 (18.3)	0.002
6 mo	45	−24.2 (15.1)	<0.001
1 y	42	−21.7 (19.6)	<0.001
Pain EQ5D
2 wk	43	0.00 (0.21)	0.9
6 wk	51	0.12 (0.2)	<0.001
6 mo	47	0.17 (0.2)	<0.001
1 y	45	0.19 (0.3)	<0.001
Leg VAS
2 wk	48	−2.6 (3.9)	<0.001
6 wk	52	−3.5 (3.5)	<0.001
6 mo	48	−4.6 (2.7)	<0.001
1 y	46	−4.4 (3.6)	<0.001
Back VAS
2 wk	48	−1.7 (2.8)	<0.001
6 wk	52	−3.5 (2.7)	<0.001
6 mo	48	−4.3 (2.3)	<0.001
1 y	46	−4.2 (2.6)	<0.001