Table 3.

Roland–Morris disability scores for back and leg pain at different assessment times in the PSM and ALG groups

Assessment time/group	Mean ± SD score
	Back pain	Leg pain
Preoperatively
PSM group (n = 18)	10.0 ± 8.7	13.5 ± 7.8
ALG group (n = 13)	15.0 ± 5.8	12.2 ± 7.6
4–6 weeks postoperatively
PSM group (n = 16)	8.8 ± 7.0	2.9 ± 4.7
ALG group (n = 13)	6.1 ± 5.3	5.2 ± 6.5
3 months postoperatively
PSM group (n = 17)	6.6 ± 7.0	4.3 ± 6.3
ALG group (n = 13)	5.8 ± 5.3	3.8 ± 4.4
6 months postoperatively
PSM group (n = 17)	5.7 ± 6.2	4.0 ± 7.4
ALG group (n = 13)	3.3 ± 4.6	4.6 ± 6.9

None of the differences between the groups were significant