The Elevated Serum Level of IFN-γ in Patients with Failed Back Surgery Syndrome Remains Unchanged after Spinal Cord Stimulation

Table 1

Characteristics of SCS parameters.

No.	Age	Gender	SCS amplitude (V)	SCS frequency (Hz)	SCS pulse width (μs)
1	46	M	4.5 (0), 4.2 (1), 4.3 (2)	40 (0, 1 ,2)	180 (0, 1, 2)
2	47	F	1.8 (0), 2.0 (1), 2.1 (2)	60 (0, 1, 2)	200 (0), 210 (1, 2)
3	70	F	6.5 (0), 6.4 (1), 6.0 (2)	60 (0, 1, 2)	180 (0, 1, 2)
4	70	M	2.3 (0), 2.5 (1), 2.3 (2)	60 (0, 1, 2)	210 (0, 1, 2)
5	68	F	5.0 (0), 4.8 (1, 2)	60 (0), 40 (1), 60 (2)	210 (0), 200 (1, 2)
6	38	M	5.0 (0), 5.2 (1, 2)	40 (0, 1, 2)	320 (0, 1, 2)
7	47	M	3.2 (0), 3.2 (1), 3.4 (2)	40 (0, 1, 2)	240 (0, 1, 2)
8	33	F	3.0 (0), 3.0 (1), 3.2 (2)	60 (0, 1, 2)	240 (0, 1, 2)
9	78	M	2.6 (0), 2.6 (1, 2)	60 (0), 40 (1), 60 (0)	180 (0, 1, 2)
10	61	M	3.7 (0), 3.6 (1, 2)	40 (0, 1, 2)	270 (0, 1, 2)
11	54	F	7.0 (0), 7.1 (1), 6.8 (2)	60 (0, 1, 2)	320 (0, 1, 2)
12	67	M	2.8 (0), 2.6 (1), 2.8 (2)	80 (0, 1, 2)	270 (0, 1, 2)
13	60	F	1.9 (0), 2.2 (1)	60 (0, 1)	180 (0, 1)
14	58	M	6.6 (0), 6.7 (1)	40 (0, 1)	300 (0, 1)
15	43	F	3.5 (0), 3.0 (1)	60 (0, 1)	240 (0, 1)
16	65	M	5.3 (0, 1)	80 (0), 60 (1)	240 (0, 1)
17	69	F	4.2 (0), 4.1 (1)	40 (0, 1)	210 (0, 1)

F: female; M: male; SCS: spinal cord stimulation; (0): measurement 24 hours after implantation; (1): measurement 1 month after implantation; (2): measurement 3 months after implantation.