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Table 1 Basic information of patients in two groups

From: Oblique lateral interbody fusion (OLIF) compared with unilateral biportal endoscopic lumbar interbody fusion (ULIF) for degenerative lumbar spondylolisthesis: a 2-year follow-up study

	OLIF-AF	ULIF	P
Sex			0.941
Male	20	28
Female	25	34
Average age (y)	59.43 ± 10.26	61.28 ± 9.41	0.452
BMI (kg/m²)	24.61 ± 3.14	25.46 ± 3.38	0.316
Smoke			0.959
Yes	22	30
No	23	32
Meyerding classification			0.640
I	26	33
II	19	29
Lesion level			0.663
L2/L3	9	8
L3/L4	14	23
L4/L5	22	31
Follow-up (m)	26.62 ± 3.57	27.45 ± 4.96	0.341

Data presented as mean ± standard deviation

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