Table 1.

Comparison of demographic variables between the non-fusion and fusion groups

Variable	Nonfusion (n=37)	Fusion (n=27)	p-value
Age (yr)	48.16±11.12 (25–70)	51.29±12.44 (26–72)
Sex
Male	25	22	0.62
Female	12	5	0.33
Basal metabolic index	23.61±4.03 (17.5–34.3)	24.56±4.36 (19.4–34.6)
Primary case
LSS	1	4	0.10
LDH	36	23	0.71
Level of lesion			0.6120
L5–S1	9	8
L4–5	27	17
L3–4	0	1
L2–3	1	1
LDH Michigan State University grade			0.71
3–A	18	14
3–AB	14	9
2–A	3	1
2–AB	1	2
LSS Schizas grade
C	5	3	0.80
D	1	1	0.82
Time to surgery	3.86±3.25 (1–15)	3.62±1.91 (1–9)	0.1845
<48 hr	18	6
>48 hr	16	20
>7 day	7	3

Values are presented as mean±standard deviation (range) or number.

LSS, lumbar spinal stenosis; LDH, lumbar disc herniation.