Table 22: Success at 2-year Follow-Up.
| Study, Year | Group | Success Treatment Group |
Success Control Group |
Number Needed To Treat |
|---|---|---|---|---|
| North et al., (81) 2005 | Test group* Implanted group* |
9/24 (37.5%) 9/17 (52.9%) |
3/26 (11.5%) 3/26 (11.5%) |
3.8 2.4 |
| Kemler et al., (63) 2004 | Test group Implanted group |
13/36 (36.1%) 13/24 (54.2%) |
1/18 (5.6%) 1/18 (5.6%) |
3.3 2.1 |
*
The test group includes all candidates who underwent a test stimulation phase. The implanted group includes only those candidates that received a permanently implanted spinal cord stimulator. North et al. (81) defined success as at least 50% pain relief and patient satisfaction with treatment Kemler et al.(63;72) defined success as 50% decrease on the VAS after SCS, compared with baseline scores.