Table 3. Results for measurement error for individuals with PPS and healthy subjects.
| τ-correlation coefficient | SEM (% of mean) | ALoA | CV | RLoA | |
| Fatigue resistance | |||||
| Fatigue resistance (% torque remaining) | |||||
| PPS | −0.065 (p = 0.700) | 3.38 (7.1%) | −9.9–9.3 | - | - |
| Control | −0.059 (p = 0.752) | 3.70 (7.0%) | −7.7–11.8 | - | - |
| MVT and contractile speed indices | |||||
| MVT (Nm) | |||||
| PPS | −0.138 (p = 0.355) | 8.83 (7.6%) | −27.1–22.0 | - | - |
| Control | −0.033 (p = 0.850) | 6.36 (3.6%) | −19.5–16.2 | - | - |
| MRTD (s−1) | |||||
| PPS | 0.518* (p = 0.001) | - | - | 30.0% | 0.42–2.28 |
| Control | 0.399* (p = 0.021) | - | - | 26.8% | 0.44–1.96 |
| RT50 (ms) | |||||
| PPS | 0.009 (p = 0.957) | 2.71 (2.2%) | −7.5–7.9 | - | - |
| Control | −0.042 (p = 0.816) | 3.46 (2.8%) | −5.6–11.0 | - | - |
| RT25 (ms) | |||||
| PPS | 0.123 (p = 0.437) | - | - | 11.6% | 0.75–1.42 |
| Control | 0.338 (p = 0.063) | - | - | 10.2% | 0.73–1.27 |
Abbreviations: SEM, standard error of measurement; ALoA, absolute limits of agreement; CV, coefficient of variation; RLoA, ratio limits of agreement; PPS, post-polio syndrome; RT50, relaxation time 50%; MVT, maximal voluntary torque; Nm, Newton meter; MRTD, maximal rate of torque development; RT25, relaxation time 25%; ms, milliseconds.
*Significant correlation (p<.05, two tailed) using Kendall's τ-correlation coefficient.