Clinical comparison of unilateral biportal endoscopic transforaminal lumbar interbody fusion verse 3D microscope-assisted transforaminal lumbar interbody fusion in the treatment of single-segment lumbar spondylolisthesis with lumbar spinal stenosis: a retrospective study with 24-month follow-up

Table 1 Baseline characteristics of the included patients

Characteristic		MMIS-TLIF (n = 23)	p value
Sex			0.851
Male	12	10
Female	14	13
Age (years)	64.15 ± 6.42	66.09 ± 6.10	0.676
Course of disease (months)	15.43 ± 17.74	14.78 ± 14.79	0.758
Surgical segment			0.985
L3–4	5	4
L4–5	12	11
L5–S1	9	8
Spondylolisthesis type			0.674
Isthmic spondylolisthesis	7	5
Degenerative spondylolisthesis	19	18
Meyerding grade			0.980
I	18	16
II	8	7

ISSN: 1749-799X