Table 2.

Patient preoperative and postoperative data.

Patient no.	Preoperative VAS	Postoperative 3-month VAS	Postoperative 12-month VAS	Preoperative Oswestry	Postoperative 3-month Oswestry	Postoperative 12-month Oswestry
1	5	3	1	56	48	10
2	8	2	2	58	32	24
3	6	3	2	68	32	24
4	7	3	1	52	24	6
5	7	3	2	72	28	16
6	6	4	2	56	32	26
7	7	2	1	74	24	16
8	8	3	2	68	48	26
9	7	1	1	64	8	12
10	8	2	2	78	6	12
11	8	3	2	64	18	16
12	8	2	2	72	12	8
13	7	3	3	68	24	18
14	6	3	2	64	18	12
15	8	2	1	78	18	12
16	9	3	0	74	24	6
17	8	1	1	82	18	8
18	8	2	0	76	16	4
Mean	7.28	2.50	1.33	68.00	23.89	14.00