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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)