It's the updated NICE guidelines to neurostimultion and is based on up to date systematic reviews and gives results and conclusions. I haven't read thru' the whole thing . . . . .yet??

The Title is
Systematic Reviews referred by the NICE Interventional Procedures
Programme on behalf of the NICE Interventional Procedures Advisory
Committee (IPAC)
http://www.nice.org.uk/nicemedia/live/1 ... /62255.pdf
Perhaps this is the most relevant part.
2.3 Efficacy
2.3.1 A case series of 18 patients reported that all patients had greater than 50% reduction in pain (measured by visual analogue scale [VAS]; 0–10 from best to worse) at 12 months, from a baseline pain score of 7.4.
2.3.2 A case series of 13 patients reported a reduction in pain (measured by VAS; 0–10 from best to worse) from a mean score of 7.4 (standard deviation [SD] 1.2) before PNFS to a mean score of 3.9 (SD 1.7) at a mean follow-up of 7 months (p<0.05). Pain relief was rated by the patients as excellent (improvement of 75% or more) in 15% (2/13) of patients, good (improvement 50–74%) in 38% (5/13), fair (improvement 25–49%) in 38% (5/13), and poor (improvement less than 24%) in 8% (1/13) of patients.
2.3.3 The case series of 18 patients reported that 89% (16/18) of patients had reduced or stopped opioid analgesic use at 12-month follow-up. The case series of 13 patients reported that 54% (7/13) of patients reported a reduction in analgesic use (exact timing of reporting unclear).
2.3.4 The case series of 13 patients reported that 69% (9/13) of patients were ‘satisfied’ or ‘very satisfied’ with treatment (exact timing of reporting unclear).
2.3.5 The Specialist Advisers listed key efficacy outcomes as pain reduction measured on a visual analogue scale; improvement in function as measured by the Oswestry Disability Index; improvement in quality of life as measured on the EQ-5D; reduction in concomitant medication for pain relief including neuropathic agents, opioids and non-steroidal anti-inflammatory drugs; and early mobilisation and rehabilitation.
Thought some of these comments were interesting
http://www.nice.org.uk/nicemedia/live/1 ... /63311.pdf
Need to add that this is for back pain BUT back pain includes pelvic pain as the area is to the gluteal crease.