Table 3.
Comparison of errors in measurements for the proposed and reference system. The mean difference and relevant standard deviation (std) together with Pearson's correlation coefficient (PCC) values are shown. Bland–Altman limits of agreement are also reported. HD: Horizontal Displacement; VD: Vertical Displacement.
| Difference | RMSE | PCC | Limits of Agreement | |||||
|---|---|---|---|---|---|---|---|---|
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| Mean | Std | Mean | Std | Mean | Std | Lower | Upper | |
| HD (mm) | 1.08 | 6.07 | 6.50 | 2.08 | 0.94 | 0.04 | −10.82 | 12.97 |
| VD (mm) | 0.75 | 9.65 | 9.90 | 4.79 | 0.94 | 0.06 | −18.17 | 19.67 |
| ankle (deg) | 0.57 | 3.10 | 3.10 | 1.10 | 0.99 | 0.01 | −6.07 | 6.07 |
| knee (deg) | −2.46 | 1.82 | 3.28 | 0.39 | 1.00 | 0.00 | −6.03 | 1.11 |
| hip (deg) | 1.49 | 1.56 | 2.18 | 0.21 | 1.00 | 0.00 | −1.55 | 4.54 |