Study of single-level lumbar degenerative diseases treated by unilateral wiltse access with unilateral nail rod fixation assisted by a new automatic retraction device

Table 1 Basic information of patients in two groups

Item	Ctrl group (n = 24)	Study group (n = 22)	t/χ²	P
Age (years)	51.04 ± 10.17	49.59 ± 9.610	0.496	0.622
Gender (male/female)	12/12	12/10	0.095	0.758
Segment (n)			0.382	0.536
L45	12	13
L5S1	12	9
Intervertebral fusion			0.1377	0.7106
Yes	21	20
No	3	2
Intervertebral fusion rate (%)	87.5	90.9
Cauda equina symptoms and decreased muscle strength (n)	0	2	2.087	0.149

ISSN: 1749-799X