Table 3.
Within-subject differences in paresthesia across frequencies
| f1 (Hz) | f2 (Hz) | Median: PT(f2)–PT(f1) (Q1, Q3) | p value | Median: CT(f2)–CT(f1) (Q1, Q3) | p value | Median DT(f2)–DT(f1) (Q1, Q3) | p value |
|---|---|---|---|---|---|---|---|
| 2 | 10 | −0.05 (−0.30, 0.0) | 0.098 | 0.0 (−0.70, 0.30) | 0.774 | 0.35 (−0.10, 1.30) | 0.405 |
| 50 | 0.0 (−0.40, 0.10) | 0.187 | −0.50 (−0.95, −0.10) | 0.002 | −0.90 (−3.30, 0.0) | 0.009 | |
| 100 | −0.2 (−0.45, 0.0) | 0.003 | −0.45 (−1.60, −0.25) | <0.001 | −1.30 (−4.30, −0.60) | <0.001 | |
| 500 | −0.45 (−0.60, −0.25) | <0.001 | −1.50 (−2.10, −0.55) | <0.001 | −2.0 (−4.40, −1.30) | <0.001 | |
| 1,000 | −0.50 (−0.65, −0.30) | <0.001 | −1.60 (−2.35, −0.70) | <0.001 | −2.15 (−4.30, −1.20) | <0.001 | |
| 10 | 50 | 0.0 (−0.15, 0.05) | 0.523 | 0.0 (−1.0, 0.20) | 0.274 | −0.85 (−2.60, −0.10) | 0.008 |
| 100 | −0.10 (−0.30, 0.0) | 0.050 | −0.20 (−1.50, 0.10) | 0.096 | −1.40 (−3.50, −0.50) | <0.001 | |
| 500 | −0.30 (−0.60, −0.20) | <0.001 | −0.40 (−2.10, −0.20) | <0.001 | −2.10 (−4.30, −0.80) | <0.001 | |
| 1,000 | −0.30 (−0.65, −0.15) | <0.001 | −0.50 (−3.10, −0.20) | <0.001 | −2.55 (−4.50, −0.90) | <0.001 | |
| 50 | 100 | −0.10 (−0.20, 0.0) | 0.278 | −0.30 (−0.45, −0.05) | 0.006 | −0.70 (−1.35, −0.20) | 0.003 |
| 500 | −0.35 (−0.50, −0.10) | <0.001 | −0.65 (−1.05, −0.40) | <0.001 | −1.15 (−1.70, −0.60) | <0.001 | |
| 1,000 | −0.20 (−0.55, −0.10) | <0.001 | −0.80 (−1.15, −0.40) | <0.001 | −1.0 (−1.90, −0.60) | <0.001 | |
| 100 | 500 | −0.20 (−0.55, −0.10) | <0.001 | −0.35 (−0.65, −0.15) | <0.001 | −0.40 (−0.90, −0.20) | 0.003 |
| 1,000 | −0.30 (−0.50, −0.10) | <0.001 | −0.45 (−0.70, −0.30) | <0.001 | −0.40 (−0.70, −0.30) | <0.001 | |
| 500 | 1,000 | −0.05 (−0.10, 0.10) | 0.714 | −0.10 (−0.15, 0.0) | 0.041 | −0.10 (−0.30, 0.10) | 0.078 |
Pairwise medians of within-participant differences. In parentheses below, the first (Q1) and third (Q3) quartiles are provided. A negative value indicates a lower value (i.e., decrease in the corresponding threshold) at the higher frequency (f2) relative to the lower frequency (f1). P values were calculated for the Wilcoxon signed-rank test, and p values <0.05 are bolded.