Table 2.

Outcomes

	Group 1 (n = 111)			Group 2 (n = 313)
Outcome	Pre-operative	Post-operative	Change	Pre-operative	Post-operative	Change
VAS back	63.6	28	35.6	72.6	33.5	39.1
VAS leg	16.5	12.9	3.6	68.1	27	41.1
EQ-5D	0.440	0.776	0.335	0.290	0.706	0.419