TABLE 2.
Kinematic metrics, correlations, intraclass correlations, and Bland-Altman analysis indicating bias and limits of agreement between the T’ena sensor and Vicon motion capture system.
| Vicon Mean (SD) | T’ena Mean (SD) | ICC(2,1) | Pearson’s r | Mean difference | Lower limit of agreement | Upper limit of agreement | |
|---|---|---|---|---|---|---|---|
| Block | |||||||
| Movement Time | 2,598.10 (327.47) | 2,638.05 (333.53) | 0.836 (0.808–0.860)* | 0.842* | −40.49 | −403.90 | 322.88 |
| Path Length | 1,174.89 (143.43) | 1,197.60 (155.29) | 0.932 (0.883–0.956)* | 0.947* | −23.58 | −122.09 | 74.92 |
| Lift Phase Peak Velocity | 11.19 (1.45) | 11.10 (1.45) | 0.887 (0.871–0.900)* | 0.888* | 0.09 | −1.25 | 1.44 |
| Lower Phase Peak Velocity | 10.84 (1.27) | 11.53 (1.53) | 0.773 (0.769–0.901)* | 0.882* | −0.69 | −2.11 | 0.73 |
| Drink | |||||||
| Movement Time | 3,683.15 (368.39) | 3,761.05 (340.77) | 0.809 (0.729–0.860)* | 0.846* | −77.89 | −492.89 | 337.10 |
| Path Length | 1,068.43 (139.47) | 1,117.74 (165.69) | 0.675 (0.555–0.756)* | 0.721* | −49.31 | −278.00 | 179.39 |
| Lift Phase Peak Velocity | 7.30 (1.70) | 6.96 (1.16) | 0.852 (0.710–0.912)* | 0.891* | 0.34 | −0.83 | 1.51 |
| Lower Phase Peak Velocity | 7.31 (1.70) | 6.50 (1.23) | 0.702 (0.259–0.853)* | 0.845* | 0.80 | −1.02 | 2.62 |
| Finger to Nose | |||||||
| Movement Time | 2,604.07 (349.42) | 2,543.15 (333.80) | 0.719 (0.672–0.758)* | 0.731* | 60.29 | −431.17 | 553.00 |
| Path Length | 1,058.28 (103.31) | 1,105.43 (208.74) | 0.496 (0.420–0.561)* | 0.648* | −47.15 | −364.86 | 270.57 |
| Lift Phase Peak Velocity | 11.56 (1.85) | 12.77 (2.01) | 0.717 (-0.007-0.895)* | 0.894* | −1.21 | −3.01 | 0.59 |
| Lower Phase Peak Velocity | 8.90 (1.58) | 9.46 (2.11) | 0.530 (0.209–0.687)* | 0.680* | −0.56 | −3.74 | 2.63 |
* refers to statistical significance < 0.05.