Table 3.
Intra-session test-retest reliability of the DynaPort MT (n = 40).
| Parameter | Pretest (Mean ± SD) |
Retest (Mean ± SD) |
Bias (95% CI) |
95% LOA | ICC2,1 (95% CI) |
SEM (SEM%) |
MDC95 (MDC95%) |
|---|---|---|---|---|---|---|---|
| Gait speed [m/s] | 0.60 ± 0.18 | 0.60 ± 0.20 | 0.00 (–0.03 to 0.03) |
–0.19 to 0.18 | 0.89 (0.79 to 0.94) |
0.06 (10.6) | 0.18 (29.3) |
| Cadence [steps/min] | 90.1 ± 15.3 | 91.7 ± 16.7 | –1.7 (–3.7 to 0.3) |
–13.9 to 10.6 | 0.92 (0.86 to 0.96) |
4.4 (4.9) | 12.2 (13.5) |
| Step length [cm] | 39.4 ± 9.4 | 38.9 ± 9.7 | 0.5 (–1.2 to 2.3) |
–10.1 to 11.1 | 0.84 (0.72 to 0.91) |
3.8 (9.8) | 10.6 (27.0) |
| Step time [s] | 0.69 ± 0.13 | 0.68 ± 0.13 | 0.01 (–0.01 to 0.03) |
–0.12 to 0.10 | 0.91 (0.84 to 0.95) |
0.04 (6.5) | 0.12 (18.0) |
| Step time asymmetry [%] | 8.8 ± 9.2 | 9.6 ± 9.9 | –0.8 (–3.1 to 1.5) |
–15.0 to 13.4 | 0.72 (0.53 to 0.84) |
5.1 (55.7) | 14.2 (154.5) |
| Step time variability [s] | 0.07 ± 0.04 | 0.08 ± 0.06 | –0.01 (–0.02 to 0.01) |
–0.09 to 0.08 | 0.58 (0.33 to 0.75) |
0.03 (42.3) | 0.09 (117.2) |
| Walk ratio [cm/steps/min] | 0.45 ± 0.12 | 0.44 ± 0.12 | 0.01 (–0.01 to 0.03) |
–0.12 to 0.15 | 0.83 (0.71 to 0.91) |
0.04 (10.1) | 0.12 (28.1) |
SD, standard deviation; CI, confidence interval; LOA, limits of agreement; ICC, intraclass correlation coefficient; SEM, standard error of measurement; MDC, minimal detectable change.