Table 1.

Patient demographics of grade II spondylolisthesis patients treated with extreme lateral interbody fusion (XLIF).

Characteristic	Statistic (n = 63)
Mean age in years (range)	66.4 (25–88)
Number of females (%)	53 (84.1)
Mean body mass index (BMI) (range)	30.8 (16.9–48.4)
Comorbidities
Tobacco use (%)	47 (74.6)
Coronary artery disease (%)	39 (61.9)
Diabetes (%)	9 (14.3)
Chronic obstructive pulmonary  disease (COPD) (%)	3 (4.8)
Preoperative steroid use (%)	9 (14.3)
Cancer (%)	7 (11.1)
Any prior lumbar surgery (%)	45 (71.4)
Prior surgery type	n = 45
Laminectomy (%)	11 (61.1)
Fusion (%)	4 (22.2)
Anterior lumbar interbody fusion    (ALIF)	3 (16.7)
Diagnoses (primary only)
Spondylolisthesis (%)	45 (71.4)
Stenosis with instability (%)	132 (46.6)
Degenerative scoliosis (%)	2 (3.2)