Table 2.
Differences in performance of walking conditions between groups
| Task | Variable | HS | CD | Between-groups p value |
|---|---|---|---|---|
| Usual | Gait speed (cm / s) | 120.43 (15.13) | 116.90 (23.78) | p = 0.61 |
| Gait speed—CV% | 4.04 (0.72) | 5.10 (2.83) | p = 0.14 | |
| Step length (cm) | 65.58 (5.58 | 64.23 (11.46) | p = 0.660 | |
| Step length—CV% | 2.96 (0.62) | 3.87 (2.12) | p = 0.093 | |
| Stance time (s) | 0.70 (0.03) | 0.75 (0.13) | p = 0.134 | |
| Stance time—CV% | 2.86 (0.37) | 3.91 (2.28) | p = 0.063 | |
| Fast | Gait speed (cm / s) | 174.37 (14.46) | 155.96 (30.02) | p = 0.027* |
| Gait speed—CV% | 4.21 (1.38) | 5.37 (1.81) | p = 0.044* | |
| Step length (cm) | 77.55 (7.01) | 74.05 (11.85) | p = 0.08 | |
| Step length—CV% | 3.01 (1.03) | 3.68 (1.73) | p = 0.176 | |
| Stance time (s) | 0.55 (0.03) | 0.60 (0.05) | p = 0.002* | |
| Stance time—CV% | 3.41 (1.01) | 5.27 (3.60) | p = 0.016* | |
| DT | Gait speed (cm / s) | 121.67 (16.97) | 107.10 (22.01) | p = 0.036* |
| Gait speed—CV% | 5.77 (2.24) | 8.28 (4.40) | p = 0.041* | |
| Step length (cm) | 65.41 (6.26) | 61.70 (8.13) | p = 0.384 | |
| Step length—CV% | 4.00 (1.98) | 5.43 (2.85) | p = 0.096 | |
| Stance time (s) | 0.69 (0.06) | 0.77 (0.10) | p = 0.022* | |
| Stance time—CV% | 4.09 (1.51) | 6.22 (3.78) | p = 0.035* | |
| DT cost | Gait speed | −7.69% | 1.4% | p = 0.030* |
| Step length | −5.43% | −0.19% | p = 0.038* | |
| Obstacle crossing | Stride Length | 87.12 (20.02) | 80.44 (20.84) | p = 0.348 |
| Stride length V | 98.40 (14.00) | 86.92 (16.76) | p = 0.037* | |
| Crossing step | 49.37 (9.64) | 44.37 (7.92) | p = 0.111 | |
| Crossing step V | 103.19 (17.20) | 89.88 (17.72) | p = 0.034* |
Data mean (standard deviation) for spatiotemporal parameter of gait are reported
HS healthy subjects, CD cervical dystonia, DT dual task, CV% percentage of coefficient of variability, Obstacle crossing analysis. SL stride length—stride before the obstacle, SLV stride length velocity—stride before the obstacle, Crossing step step crossing the obstacle, CSV crossing step velocity
*Statistical significant difference: p < .05