Figure 16. Percentage reduction (≥50% responder rate) in overall VAS score at week 24 from
baseline
The following table summarizes the proportion of subjects with a decrease in overall VAS score by
<30%, ≥30% and <50%, and ≥50% under each stimulation mode. Overall, more subjects
experienced a reduction in overall VAS score of ≥50% while using burst stimulation than while
using tonic stimulation (39 versus 32) and fewer subjects experienced reduction in overall VAS
score by <30% while using burst stimulation (40 versus 49).
Table 35. Summary of decrease in overall VAS score from baseline by three categories
Decrease in Overall VAS From Baseline
Arm 1: Tonic/Burst
<30% 18/45 (40.0%) 21/45 (46.7%)
≥30%, <50% 10/45 (22.2%) 8/45 (17.8%)
≥50% 17/45 (37.8%) 16/45 (35.6%)
Arm 2: Burst/Tonic
<30%
22/55 (40.0%) 28/55 (50.9%)
≥30%, <50%
11/55 (20.0%) 11/55 (20.0%)
≥50%
22/55 (40.0%) 16/55 (29.1%)
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