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Table 1 Patients’ characteristics at study enrolment time

From: Benefits in pain perception, ability function and health-related quality of life in patients with failed back surgery syndrome undergoing spinal cord stimulation in a clinical practice setting

Description of characteristics Mean(±SD) or frequency
Total number of patients 80
Age (mean ± SD years) 58 (±13)
Male (%) 32 (40%)
Education, (%)
 Primary 39 (49%)
 Lower secondary 27 (34%)
 Upper secondary 12 (15%)
 Graduate 1 (1%)
 None 1 (1%)
Number of previous surgical interventions, n (%)
 1 23 (33%)
 2 31 (44%)
 3 13 (19%)
 4 3 (4%)
 Information not available 10
Age (mean ± SD years) at pain onset 48 (±14)
Time (mean ± SD years) between pain onset and recruitment 11 (±9)