Table 2.

Demographic characteristics of the patients.

Characteristics
Age	61.5 ± 11.2 (29–71)
Sex	Male: 7 (33.3%); female: 14 (66.7%)
BMI (kg/m2)	26.5 ± 7.1 (17.0–45.9)
Bone density (T-score)	−1.6 ± 0.8 (−4.0–1.5)
Primary diagnosis
Spinal stenosis without spondylolisthesis	12 (57.1%)
Isthmic spondylolisthesis	2 (9.5%)
Degenerative spondylolisthesis	6 (28.6%)
Foraminal stenosis	3 (14.3%)
Adjacent segment pathology	1 (4.8%)
Recurrent disc herniation	1 (4.8%)
Comorbid conditions	Diabetes mellitus: 11 (52.3%)
	Hypertension: 10 (47.6%)
Cage type	Banana-shaped: 8 (38.1%); straight: 13 (61.9%)
Bilateral decompression through unilateral facetectomy	5 (23.8%)
Perioperative parameter
Operation time (mins)	126.4 ± 30.9 (110–155)
Blood loss (mL)	212 ± 90.1 (200–450)
Postoperative hospital stay (days)	7.1 ± 3.3 (6–12)
Complications	2 (14.3%)
	(1: dural tear; 1: screw malposition)