Table 4.

The change of functional outcomes after repeat surgery

	Group AP		Group PA
	Preoperative	Postoperative	Preoperative	Postoperative
Nurick scale
0	0	5	0	8
1	4	2	3	5
2	1	2	7	3
3	4	1	4	0
4	1	0	3	1
5	0	0	0	0
Average*	2.20	0.90	2.41	0.88

Nurick scale: 0, signs or symptoms of root involvement but without evidence of spinal cord disease; 1, signs of spinal cord disease but no difficulty in walking; 2, slight difficulty in walking that did not prevent full-time employment; 3, difficulty in walking that prevented full-time employment or the ability to perform all housework but that was not severe enough to require someone else’s help to walk; 4, able to walk with someone else’s help or with the aid of a frame; 5, chairbound or bedridden.

^*p<0.05