Efficacy of Spinal Cord Stimulation for Failed Back Surgery Syndrome in Elderly Patients: A Retrospective Study

Table 1

Subject demographics.

	<75 years old n = 27	≥75 years old n = 46	value
Age mean (SD)	63.6 (8.2)	81.3 (4.4)	<0.001^†
Gender n
Female	15	25	1.000
Male	12	21
Duration of pain (months) mean (SD)	67.6 (93.2)	66.0 (81.9)	0.489^†
Operative time (min) mean (SD)	55.2 (22.8)	57.7 (19.2)	0.163^†
Previous spine surgery type
Laminectomy	22	38	1.000
Fusion	2	6	0.702
Discectomy	3	2	0.352
Level of operation
L3/4 and above	4	5	0.718
L4/5	12	24	0.630
L5/S1	3	4	0.705
Multiple levels	8	13	1.000
Number of previous spine surgeries mean (SD)	1.6 (1.1)	1.3 (0.7)	0.392^†

Fisher’s exact test, ^†Mann–Whitney U test.