Table 2. Repeatability.
| Baseline mean ± SD | Retest mean ± SD | Mean difference (95% CI) | SEM | SDCind | SDCgrp | ICC (95% CI) | |
|---|---|---|---|---|---|---|---|
| Total score (n = 123)* | 10.9 ± 6.5 | 10.5 ± 6.1 | 0.69 (1.36; 0.03) | 2.6 | 7.3 | 0.7 | 0.90 (0.86–0.93) |
| Radiation (n = 129)* | 1.4 ± 0.9 | 1.2 ± 1.0 | 0.28 (0.44; 0.12) | 0.7 | 1.8 | 0.2 | 0.67 (0.53–0.77) |
| Pain pattern (n = 131)* | 0.3 ± 0.7 | 0.3 ± 0.7 | -0.01 (0.13; -0.15) | 0.6 | 1.6 | 0.1 | 0.52 (0.32–0.66) |
| Burning sensation (n = 132)* | 1.3 ± 1.5 | 1.3 ± 1.3 | 0.01 (0.22; -0.20) | 0.9 | 2.4 | 0.3 | 0.76 (0.66–0.83) |
| Tingling/prickling sensation (n = 130)* | 1.2 ± 1.5 | 1.4 ± 1.3 | -0.19 (0.01; -0.40) | 0.8 | 2.3 | 0.2 | 0.77 (0.68–0.84) |
| Pain at light touching (n = 131)* | 0.9 ± 1.2 | 0.8 ± 1.0 | 0.12 (0.29; -0.04) | 0.7 | 1.9 | 0.2 | 0.77 (0.67–0.84) |
| Sudden pain attacks/electric (n = 131)* | 2.3 ± 1.6 | 2.1 ± 1.4 | 0.26 (0.49; 0.03) | 0.9 | 2.6 | 0.2 | 0.75 (0.65–0.83) |
| Pain at cold/heat (n = 129)* | 0.6 ± 1.0 | 0.6 ± 1.0 | -0.03 (0.09; -0.16) | 0.5 | 1.1 | 0.1 | 0.86 (0.80–0.90) |
| Numbness sensation (n = 130)* | 1.1 ± 1.3 | 1.2 ± 1.3 | -0.05 (0.15; -0.26) | 0.9 | 2.4 | 0.2 | 0.74 (0.63–0.81) |
| Pain at slight pressure (n = 132)* | 1.9 ± 1.5 | 1.8 ± 1.3 | 0.15 (0.33; -0.03) | 0.8 | 2.1 | 0.2 | 0.84 (0.77–0.89) |
Abbreviations: SD, standard deviation; CI, confidence interval; SEM, standard error of measurement; SDCind, smallest detectable change at the individual level; SDCgrp, smallest detectable change at the group level; ICC, intraclass correlation coefficient. Mean difference = baseline mean–retest mean.
* 123 complete cases were included in the repeatability analysis, yet for individual items there were fewer missing cases.