Table 2 Group comparisons of the trajectory-based spatial parameters during the TUG test
All (n = 63) | |||
|---|---|---|---|
Normal group (n = 38) | Mild cognitive impairment group (n = 25) | p-value | |
The minimum distance from the marker D M , min (cm) | 15.3 ± 3.9 | 13.2 ± 3.9 | 0.044* |
The maximum distance from y-axis in forward phase \( {D}_{\left|y\right|,\mathit{\max}}^F \) (m) | 0.47 ± 0.07 | 0.45 ± 0.06 | 0.352 |
The length of trajectories in forward phase L C , F (m) | 3.45 ± 0.10 | 3.46 ± 0.13 | 0.840 |
The area of the center of gravity in forward phase A C , F (m2) | 0.72 ± 0.17 | 0.61 ± 0.16 | 0.012* |
The maximum distance from x-axis in backward phase \( {D}_{\left|y\right|,\mathit{\max}}^B \) (m) | 0.47 ± 0.08 | 0.46 ± 0.11 | 0.483 |
The length of trajectories in backward phase L C , B (m) | 3.43 ± 0.14 | 3.40 ± 0.17 | 0.408 |
The area of the center of gravity in backward phase A C , B (m2) | 0.78 ± 0.21 | 0.75 ± 0.25 | 0.573 |
The forward/whole phase ratio of maximum distance from x-axis (%) | 50.0 ± 5.9 | 50.4 ± 6.5 | 0.785 |
The forward / whole phase ratio of length of trajectories (%) | 50.1 ± 1.1 | 50.4 ± 1.5 | 0.410 |
The forward / whole phase ratio of area of the center of gravity (%) | 49.3 ± 10.8 | 42.9 ± 10.7 | 0.026* |