Table 1.

Patients characteristics without and with spondylolisthesis before surgery.

	Without spondylolisthesis n = 35	With spondylolisthesis n =18	P
Gender			1.000
Male	17 (49%)	9 (50%)
Female	18 (51%)	9 (50%)
Age (years)*	62 ± 12	63 ± 12	0.376
Side			0.780
Left	16 (46%)	9 (50%)
Right	19 (54%)	9 (50%)
Level			0.867
L3-4	4 (11%)	3 (17%)
L4-5	27 (77%)	13 (72%)
L5-S1	4 (11%)	2 (11%)
Cyst size* (mm)	8 ± 4	10 ± 5	0.239
Low back pain			0.565
Present	20 (57%)	12 (67%)
Absent	15 (43%)	6 (33%)
Weakness			0.104
Present	3 (9%)	5 (28%)
Absent	32 (91%)	13 (72%)

Values are numbers of patients with (%) except when marked with *;

^*Values contain mean ± SD.