Table 4:
Dual-task interference on gait among genetic low risk and high risk (APOE ε4 carriers) groups
| Gait Parameters | Absolute Difference |
Dual-Task Effect (DTEg) |
||||
|---|---|---|---|---|---|---|
| Low Risk Group N=15 Mean (SD) |
High Risk Group N=14 Mean (SD) |
Effect Size for Group Difference | Low Risk Group N=15 Mean (SD) |
High Risk Group N=14 Mean (SD) |
Effect Size for Group Difference | |
| Cognitive Task = Memory | ||||||
| Gait Speed (m/s) | 0.35 (0.24) | 0.40 (0.16) | 0.24 | −32% (22%) | −34% (13%) | 0.12 |
| Step Length (cm) | 8.9 (7.1) | 11.5 (5.2) | 0.40 | −14% (11%) | −18% (7%) | 0.36 |
| Cognitive Task = EFnormal | ||||||
| Gait Speed (m/s) | 0.13 (0.14) | 0.26 (0.20) | 0.70 | −12% (14%) | −21% (14%) | 0.62 |
| Step Length (cm) | 3.8 (4.7) | 8.3 (7.7) | 0.69 | −6% (8%) | −12% (10%) | 0.64 |
| Cognitive Task = EFreverse | ||||||
| Gait Speed (m/s) | 0.10 (0.17) | 0.19 (0.18) | 0.48 | −10% (16%) | −15% (13%) | 0.36 |
| Step Length (cm) | 3.2 (5.5) | 6.3 (6.3) | 0.52 | −5% (9%) | −9% (8%) | 0.45 |
Absolute difference, difference between parameter in single-task and dual-task condition; DTEg, Dual-Task Effect on gait: [(dual-task − single-task)/single-task] × 100%; SD, standard deviation.