Table 1.

Patient characteristics

Patient	Gender	Age	Diagnosis	ASA	No. of comorbidities	Fused levels
1	Female	79	Stenosis	III	3	2
2	Female	77	Spondylolisthesis	III	3	2
3	Female	79	Stenosis	II	2	5
4	Female	72	Stenosis	II	1	2
5	Female	73	Spondylolisthesis	II	0	1
6	Female	73	Spondylolisthesis	II	2	2
7	Female	79	Spondylolisthesis	II	3	1
8	Female	81	Spondylolisthesis	III	5	1
9	Male	79	Stenosis	III	7	1
10	Female	80	Stenosis	II	2	4
11	Female	76	Stenosis	III	4	2
12	Female	79	Spondylolisthesis	II	1	2
13	Female	75	Spondylolisthesis	II	0	2
14	Male	79	Stenosis	II	0	2
15	Female	78	Stenosis	II	1	2
16	Female	80	Spondylolisthesis	II	1	1
17	Female	75	Spondylolisthesis	II	2	1
18	Male	78	Stenosis	III	2	1
19	Female	77	Stenosis	II	1	2
20	Female	81	Spondylolisthesis	II	4	1
21	Female	70	Stenosis	II	1	2
22	Female	79	Spondylolisthesis	III	2	2
23	Female	74	Spondylolisthesis	II	2	3