4-6 months follow- 6-12 months follow- >12 months follow-     up group up group up group Feature   (n=26) (n=45) (n=34) 5-Point VAS 77 (61-93) 67 (53-81) 32 (16-48) Decrease         % (95% CI)         2-Point VAS 92 (82-100) 84 (73-95) 74 (59-89) Decrease         % (95% CI)         CI=Confidence Interval

Table 3: Proportion of subjects achieving 5-point decrease in visual analogue scale (vas) pain scores, and 2-point decrease in vas pain scores, with subjects stratified by time to final follow-up.