Table 2.
Mean (SD) values for walking and the cognitive task values in all groups under single-task (ST) and both dual-task conditions.
| ST | DTwalk | DTcog | |
|---|---|---|---|
| Gait speed (m/s) | |||
| HYA | 1.86 (.21) | 1.88 (.22) | 1.80 (.23) |
| HOA | 1.56 (.25) | 1.58 (.25) | 1.51 (.29) |
| PD | 1.33 (.24) | 1.28 (.22) | 1.22 (.22) |
|
| |||
| Stride length (m) | |||
| HYA | 1.68 (0.15) | 1.68 (.15) | 1.63 (.15) |
| HOA | 1.43 (0.20) | 1.40 (.21) | 1.38 (.22) |
| PD | 1.31 (0.20) | 1.27 (.19) | 1.24 (.20) |
|
| |||
| Cadence (steps/min) | |||
| HYA | 134 (15) | 135 (16) | 132 (16) |
| HOA | 131 (12) | 135 (13) | 132 (15) |
| PD | 122 (15) | 122 (16) | 119 (14) |
|
| |||
| Step width (m) | |||
| HYA | 0.14 (.02) | 0.14 (.02) | 0.14 (.02) |
| HOA | 0.13 (.02) | 0.14 (.03) | 0.13 (.03) |
| PD | 0.13 (.03) | 0.13 (.04) | 0.13 (.04) |
|
| |||
| Step width variability (%) | |||
| HYA | 15.1 (5.2) | 15.7 (6.0) | 13.3 (4.5) |
| HOA | 17.8 (4.9) | 16.2 (3.8) | 17.9 (4.4) |
| PD | 16.2 (5.0) | 14.8 (5.0) | 16.3 (4.5) |
|
| |||
| Stride time variability (%) | |||
| HYA | 2.3 (.7) | 2.1 (.7) | 2.0 (.5) |
| HOA | 2.6 (1.2) | 2.5 (.8) | 2.3 (1.0) |
| PD | 2.7 (1.0) | 2.7 (1.0) | 2.8 (1.4) |
|
| |||
| Inclination angle (degrees) | |||
| HYA | 7.4 (.6) | 7.4 (.7) | 7.5 (.7) |
| HOA | 7.6 (1.0) | 7.6 (1.0) | 7.5 (1.1) |
| PD | 7.5 (.9) | 7.6 (1.0) | 7.5 (.9) |
|
| |||
| Response latency (s) | |||
| HYA | 0.65 (.10) | 0.82 (.12) | .66 (.10) |
| HOA | 0.87 (.15) | 0.90 (.15) | 0.89 (.13) |
| PD | 0.97 (.17) | 1.08 (.24) | 1.03 (.24) |
|
| |||
| Response accuracy (%) | |||
| HYA | 99.2 (1.1) | 98.8 (2.3) | 99.7 (.9) |
| HOA | 98.0 (3.9) | 97.4 (5.5) | 97.1 (5.7) |
| PD | 90.3 (11.2) | 89.9 (13.5) | 92.9 (11.1) |