Radiological and clinical outcomes of midline lumbar fusion on sagittal lumbar-pelvic parameters for degenerative lumbar diseases

Table 1 Comparison of baseline data between the midline lumbar fusion and minimally invasive transforaminal lumbar interbody fusion groups

	MIDLF (n = 34)	MIS-TLIF (n = 29)	P value
Age (yr)	62.94 ± 13.03	58.76 ± 8.65	0.146
Gender (male/female)	14/20	16/13	0.268
BMI (kg/cm2)	25.82 ± 3.81	26.06 ± 3.68	0.802
Main diagnosis
Lumbar spinal stenosis	20	8
Lumbar disc herniation	11	19
Lumbar spondylolisthesis	3	2
Operation segment
L3-4	2	0
L4-5	25	20
L5-S1	7	9
Operation duration (min)	227.88 ± 35.53	240.24 ± 38.47	0.190
Estimated blood loss (mL)	400 (200-600)	300 (150-500)	0.013a
Hospital stay time (d)	7 (4-11)	6 (3-11)	0.085
Follow-up time (mo)	15.65 ± 2.65	15.31 ± 1.85	0.568

^aP < 0.05.

BMI: Body mass index; MIDLF: Midline lumbar fusion; MIS-TLIF: Minimally invasive transforaminal lumbar interbody.