Table 4.
Pain relief and freedom at 15 minutes after initiating therapy. Data are presented for least squared mean (LSM) estimate from the GEE model. The LSM has been back-transformed from the logit scale to the probability scale and represents the estimate of probability of pain relief.
| Full stimulation |
Sub-perception stimulation |
Sham stimulation |
||||
|---|---|---|---|---|---|---|
| Relief | Freedom | Relief | Freedom | Relief | Freedom | |
| Probability of pain Relief/freedom (GEE LSM) | 67.1% | 34.1% | 7.3% | 1.6% | 7.4% | 1.5% |
| 95% CI (GEE LSM) | 50.2–80.5% | 18.6–54.1% | 4.0–13.2% | 0.5–5.1% | 3.9–13.7% | 0.5–4.9% |
| p value compared to sham (GEE LSM) | <0.0001 | <0.0001 | 0.96 | 0·97 | — | — |
GEE: generalized estimating equation; CI: confidence interval.