VAS Decrease at 4-6 Months 6-12 Months >12 Months Final Follow-Up (n=26) (n = 45) (n = 34)   % (95% Confidence Interval) % (95% Confidence Interval) % (95% Confidence Interval) 100% 27 (10-44) 38 (24-52) 15 (3-27) ≥ 90% 35 (17-53) 40 (26-54) 18 (5-31) ≥ 80% 43 (24-62) 44 (30-59) 24 (10-38) ≥ 70% 55 (36-74) 53 (38-68) 33 (17-49) ≥ 60% 82 (67-97) 64 (50-78) 45 (28-62) ≥ 50% 86 (73-99) 71 (58-84) 48 (31-65)

Table 2: Percentage of subjects who achieved ≥ 50-100% visual analogue scale (vas) pain score reduction, stratified by time to final follow-up.