Table 1.

Patient and treatment characteristics

ID	Age	Sex	Primary diagnosis	Original operation	Number of VAC dressing change	Irrigation duration (days)	Hospital stay (days)
1	57	F	LSS	L4-S1 TLIF	1	7	29
2	73	M	LSS, LDH	L3-5 TLIF	2	10	24
3	71	M	LSS	L4-5 TLIF	2	11	27
4	59	M	LSS	L4-S1 TLIF	2	10	26
5	58	F	LIS, LDH	L4-S1 TLIF	2	11	37
6	46	F	LSS	L4-5 TLIF	1	6	29
7	74	M	LSS, LDH	L1-5 TLIF	2	10	33
8	34	F	LIS	L4-5 TLIF	2	12	28
9	79	M	LSS	L4-S1 PLIF	1	7	25
10	66	M	LSS, LDH	L3-5 TLIF	2	11	33
11	65	F	LDS, LSS	L4-S1 TLIF	3	16	53
12	68	M	LSS, LDH	L1-5 TLIF	2	9	34
13	48	M	LSS	L4-5 TLIF	2	13	31
14	77	F	LIS, LSS	L3-5 TLIF	2	8	32
15	53	M	LSS	L5-S1 TLIF	1	5	27
16	72	M	LIS	L4-5 PLIF	2	8	35
17	63	F	LIS	L4-5 TLIF	2	12	26
18	57	M	LSS, LDH	L3-5 TLIF	2	11	27
19	74	F	LSS	L3-5 TLIF	2	14	31
20	51	M	LSS, LDH	L2-3 TLIF	2	13	24
21	76	F	LSS	L3-S1 TLIF	2	10	28

VAC vacuum-assisted closure, F female, M male, LIS lumbar isthmic spondylolisthesis, LDH lumbar disc herniation, LSS lumbar spinal stenosis, LDS lumbar degenerative spondylolisthesis, TLIF transforaminal lumbar interbody fusion, PLIF posterior lumbar interbody fusion