Table 2.
Test-retest reliability for spatiotemporal gait parameters of instructed slow walking speed (SWS), comfortable walking speed (CWS) and fast walking speed (FWS) conditions in healthy young adults (HYA) and CWS in people with Parkinson’s disease (PD) derived from Interactive Walkway and HoloLens data.
| Interactive Walkway | HoloLens | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Trial 1 | Trial 2 | Trial 1 | Trial 2 | |||||||||
| Mean ± SD | Mean ± SD | Bias (95% LoA) | t-Statistics | ICC(A,1) | Mean ± SD | Mean ± SD | Bias (95% LoA) | t-Statistics | ICC(A,1) | |||
|
Walking speed
(cm/s) |
HYA | SWS | 76.1 ± 13.0 | 78.1 ± 12.5 | −2.0 (−14.8 10.8) | t(21) = −1.42, p = 0.169 | 0.863 | 74.2 ± 12.6 | 76.2 ± 12.2 | −2.0 (−14.6 10.5) | t(21) = −1.49, p = 0.152 | 0.861 |
| CWS | 119.6 ± 16.8 | 125.8 ± 17.1 | −6.2 (−19.0 6.6) | t(21) = −4.45, p < 0.001 * | 0.871 | 116.2 ± 16.2 | 122.1 ± 16.4 | −5.9 (−18.4 6.6) | t(21) = −4.33, p < 0.001 * | 0.870 | ||
| FWS | 182.3 ± 22.9 | 180.4 ± 23.7 | 1.9 (−14.9 18.8) | t(21) = 1.04, p = 0.310 | 0.932 | 176.3 ± 21.8 | 174.7 ± 22.8 | 1.7 (−14.7 18.1) | t(21) = 0.93, p = 0.362 | 0.930 | ||
| PD | CWS | 105.2 ± 21.4 | 106.9 ± 21.4 | −1.7 (−16.8 13.3) | t(22) = −1.09, p = 0.289 | 0.935 | 104.5 ± 20.7 | 106.1 ± 20.8 | −1.6 (−16.2 13.1) | t(22) = −1.01, p = 0.324 | 0.935 | |
|
Step length
(cm) |
HYA | SWS | 57.5 ± 6.6 | 58.0 ± 5.6 | −0.5 (−5.9 4.9) | t(21) = −0.83, p = 0.417 | 0.899 | 56.2 ± 6.4 | 56.8 ± 5.4 | −0.6 (−6.2 5.0) | t(21) = −0.95, p = 0.355 | 0.884 |
| CWS | 69.6 ± 7.1 | 71.2 ± 6.9 | −1.5 (−6.0 3.0) | t(21) = −3.12, p = 0.005 * | 0.928 | 67.9 ± 7.0 | 69.7 ± 6.6 | −1.8 (−6.4 2.8) | t(21) = −3.64, p = 0.002 * | 0.911 | ||
| FWS | 89.1 ± 8.2 | 88.6 ± 9.0 | 0.5 (−5.1 6.2) | t(21) = 0.84, p = 0.411 | 0.945 | 86.2 ± 8.0 | 85.5 ± 8.3 | 0.7 (−5.4 6.7) | t(21) = 0.99, p = 0.334 | 0.928 | ||
| PD | CWS | 58.4 ± 11.8 | 58.7 ± 11.4 | −0.3 (−8.2 7.7) | t(22) = −0.34, p = 0.739 | 0.941 | 57.8 ± 11.5 | 57.8 ± 10.9 | 0.0 (−7.9 7.8) | t(22) = −0.03, p = 0.977 | 0.939 | |
|
Cadence
(steps/min) |
HYA | SWS | 79.4 ± 10.2 | 80.9 ± 9.9 | −1.4 (−9.9 7.0) | t(21) = −1.57, p = 0.132 | 0.903 | 79.2 ± 9.8 | 80.6 ± 9.6 | −1.4 (−9.6 6.8) | t(21) = −1.58, p = 0.130 | 0.903 |
| CWS | 104.3 ± 8.5 | 107.4 ± 8.8 | −3.1 (−8.6 2.4) | t(21) = −5.20, p < 0.001 * | 0.892 | 103.8 ± 8.5 | 106.5 ± 8.7 | −2.7 (−9.0 3.6) | t(21) = −3.90, p < 0.001 * | 0.890 | ||
| FWS | 125.7 ± 11.5 | 125.9 ± 10.3 | −0.2 (−9.8 9.4) | t(21) = −0.17, p = 0.867 | 0.903 | 124.1 ± 10.4 | 123.7 ± 9.8 | 0.4 (−5.7 6.5) | t(21) = 0.60, p = 0.553 | 0.953 | ||
| PD | CWS | 110.3 ± 7.7 | 111.2 ± 7.3 | −0.9 (−11.1 9.2) | t(22) = −0.87, p = 0.391 | 0.765 | 109.6 ± 7.6 | 110.5 ± 7.0 | −0.9 (−10.4 8.7) | t(22) = −0.87, p = 0.392 | 0.778 | |
Abbreviations: SD = between-subjects standard deviation; LoA = limits of agreement; ICC(A,1) = intraclass correlation coefficient for absolute agreement. * Significant over-repetitions difference (p < 0.05).