Table 4.
Correlation coefficient (r), Concordance correlation coefficients (rc), and Intraclass correlation coefficient (ICC) of gait parameters measured by Kinect and gold standard. (Kinematic Parameters).
| Outcome Measure | Pfister et al. [18] ** | Geerse et al. [21] | Xu et al. [19] | Mentiplay et al. [23] * | Galna et al. [14] *** |
|---|---|---|---|---|---|
| Vertical displacement of the knee during walking on spot | HC
r = 0.822 (LoA95% = 66.80) PWPD r = 0.848 (LoA95% = 123.37) |
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| Nineteen matched body points in AP, ML and V directions | ICC was generally >0.60 for all directions; yet, some time series demonstrated poor to fair agreement e.g., Left Ankle: AP ICC = 0.970 ML ICC = 0.871 V ICC = 0.392 |
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| Ankle flexion |
r = 0.11 rc = 0.01 |
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| Peak knee flexion-swing | Left knee r = 0.79 (−14.1 ± 7.05) Right knee r = 0.87 (−16.73 ± 5.45) |
r = −0.05 rc = −0.02 |
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| Peak knee flexion contact |
r = −0.01 rc = −0.01 |
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| Knee adduction |
r = −0.07 rc = 0.0 |
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| Knee extension | Left knee r = 0.78 (3.07 ± 6.11) Right knee r = 0.84 (4.43 ± 6.25) |
r = 0.81 rc = 0.41 |
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| Hip flexion | Left hip r = −0.06 (−10.81 ± 9.95) Right hip r = 0.15 (−8.12 ± 10.49) |
r = 0.95 rc = 0.71 |
r = 0.49 rc = 0.08 |
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| Hip extension | Left hip r = −0.22 (−2.55 ± 10.89) Right hip r = −0.32 (−7.84 ± 11.47) |
* Reported values refer to comfortable walking pace; ** Values in parentheses refer to error magnitude since rc was not stated; *** Values in parentheses refer to Limit of agreement magnitude since rc was not stated; HC = Healthy Controls; PWPD = Patients with Parkinson’s disease; AP = anterior-posterior; ML = mediolateral; V = vertical.