Table 3.

Reason for Revision

Case	Sex	Age	Segment	Main Symptom Before Revision	Diagnosis for Revision	Revision	Time to Revision
Single level
1	M	56	L4-5	Radiating pain	Herniated disk	Diskectomy	20
2	M	70	L4-5	Claudication	Restenosis and adjacent stenosis	2 level decompression	80
3	F	71	L4-5	Radiating pain	Foraminal stenosis	TLIF	25
4	F	53	L5-S1	Radiating pain	Foraminal stenosis	TLIF	18
5	F	67	L4-5	Claudication	Spondylolisthesis L4-5	TLIF	7
6	F	82	L4-5	Claudication	Foraminal stenosis and adjacent level stenosis	TLIF with L3-4 decompression	52
7	F	73	L4-5	Claudication	Foraminal stenosis	TLIF	56
8	M	70	L5-S1	Radiating pain	Foraminal disk herniation	TLIF	16
Multilevel
1	M	60	L4-5-S1	Claudication	Spinal stenosis L34	Decompression	26
2	F	74	L3-4-5	Claudication	Spondylolisthesis L4-5	TLIF	51
3	M	63	L4-5-S1	Radiating pain	Foraminal stenosis L5-S1	TLIF	46
4	F	65	L4-5-S1	Radiating pain	Foraminal disk herniation L5-S1	TLIF	53
5	F	59	L3-4-5	Claudication	Spinal stenosis L5-S1	Decompression	48
6	F	66	L3-4-5	Claudication	Spondylolisthesis L4-5	TLIF	9
7	F	72	L3-4-5	Radiating pain	Disk herniation L5-S1	Diskectomy	25