Table 2.
Kinematic measurement (VT acceleration, velocity, and displacement) agreement between the HoloLens and HD/LB sensors. NRMSE-Normalized Root Mean Squared Error. Xcor-Cross Correlation Coefficient. All values reported as the mean and 95% confidence interval.
| HoloLens vs. HD | ||||
| A | V | D | ||
| STS | NRMSE | 9.60 (8.70,10.51) | 4.83(4.22,5.45) | 5.58 (4.29, 6.87) |
| Xcor | 0.888(0.872,0.904) | 0.979(0.975,0.983) | 0.993 (0.989 0.997) | |
| TUG | NRMSE | 10.53 (9.60,11.46) | 6.16 (5.57,6.76) | 19.56 (17.24,21.87) |
| Xcor | 0.802 (0.770,0.834) | 0.926(0.918,0.934) | 0.998 (0.997 0.999) | |
| HoloLens vs. LB | ||||
| A | V | D | ||
| STS | NRMSE | 9.77 (8.29,11.25) | 8.55 (6.98,10.12) | 11.88 (9.72,14.03) |
| Xcor | 0.765 (0.704,0.827) | 0.900(0.851,0.949) | 0.965 (0.949,0.982) | |
| TUG | NRMSE | 8.48 (7.56,9.41) | 7.68 (7.05,8.31) | 14.07 (11.86,16.28) |
| Xcor | 0.740 (0.695,0.786) | 0.853 (0.835,0.872) | 0.986 (0.978 0.993) | |