N | Memory Impairment (n = 19) | Gait Instability (n = 46) | Recurrent Falls (n =30) | Cautious Gait (n = 8) | p-value (Kruskal-Wallis) | |||||
---|---|---|---|---|---|---|---|---|---|---|
Mean ± SD Median | Single Task | Dual Task | Single Task | Dual Task | Single Task | Dual Task | Single Task | Dual Task | Single Task | Dual Task |
Walking Speed (m/s) | 1.2 ± 0.2 1.2 | 1.0 ± 0.3 1.0 | 1.0 ± 0.2 1.0 | 0.9 ± 0.2 0.9 | 0.9 ± 0.2 0.9 | 0.8 ± 0.3 0.7 | 0.7 ± 0.2 0.7 | 0.6 ± 0.3 0.6 | <0.01 | <0.01 |
Stride Frequency (Hz) | 0.92 ± 0.07 0.92 | 0.80 ± 0.14 0.81 | 0.92 ± 0.09 0.9 | 0.82 ± 0.09 0.84 | 0.88 ± 0.09 0.87 | 0.78 ± 0.12 0.78 | 0.90 ± 0.08 0.90 | 0.80 ± 0.11 0.83 | 0.04* | 0.33 |
Stride Regularity (dimensionless) | 258 ± 54 269 | 195 ± 54 205 | 214 ± 47 217 | 170 ± 51 165 | 199 ± 56 210 | 159 ± 62 165 | 147 ± 55 145 | 115 ± 73 107 | <0.01 | 0.05 |