Table 2.
Univariate logistic regression of gait characteristics’ 10th, 50th, and 90th percentile values, with future falls (B values [P values] are based on z-transformed data).
| Characteristics | 10th perc. B (P) |
Median B (P) |
90th perc. B (P) |
| Gait speed | -0.36 (.03) | -0.38 (.02)a | -0.32 (.04) |
| Speed variability | 0.26 (.10) | 0.19 (.21) | -0.08 (.60) |
| Stride frequency | -0.21 (.15) | -0.31 (.04)a | -0.15 (.41) |
| Frequency variability VT | 0.25 (.09) | 0.26 (.08) | -0.12 (.41) |
| Frequency variability ML | 0.25 (.10) | 0.21 (.15) | 0.01 (.96) |
| Frequency variability AP | 0.33 (.03)a | 0.27 (.07) | 0.07 (.61) |
| Stride regularity VT | -0.23 (.14) | -0.34 (.03)a | -0.26 (.08) |
| Stride regularity ML | 0.07 (.65) | -0.08 (.58) | -0.06 (.70) |
| Stride regularity AP | -0.24 (.12) | -0.32 (.04)a | -0.37 (.02)a |
| RMS VT | -0.29 (.07) | -0.50 (.004)a | -0.41 (.009) |
| RMS ML | 0.09 (.53) | -0.08 (.60) | -0.06 (.67) |
| RMS AP | -0.20 (.19) | -0.37 (.02)a | -0.25 (.11) |
| Low frequency percentage VT <0.7 Hz | 0.20 (.18) | 0.38 (.01)a | 0.23 (.11) |
| Low frequency percentage ML <10 Hz | 0.24 (.12) | 0.33 (.04)a | 0.15 (.32) |
| Low frequency percentage AP <0.7 Hz | 0.28 (.06) | 0.37 (.01)a | 0.27 (.07) |
| Index of harmonicity VT | -0.16 (.30) | -0.23 (.12) | -0.20 (.17) |
| Index of harmonicity ML | 0.27 (.07) | 0.24 (.11) | 0.13 (.37) |
| Index of harmonicity AP | 0.11 (.45) | 0.18 (.23) | 0.28 (.07) |
| Harmonic ratio VT | -0.03 (.83) | -0.43 (.009)a | -0.51 (.003)a |
| Harmonic ratio ML | 0.11 (.46) | -0.25 (.11) | -0.32 (.048)a |
| Harmonic ratio AP | -0.05 (.76) | -0.41 (.01)a | -0.53 (.002)a |
| Local dynamic stability VT | 0.29 (.053) | 0.33 (.03)a | 0.22 (.16) |
| Local dynamic stability ML | 0.10 (.51) | 0.08 (.58) | 0.03 (.86) |
| Local dynamic stability AP | 0.38 (.02)a | 0.34 (.03)a | 0.27 (.08) |
| Sample entropy VT | 0.60 (<.001)a | 0.41 (.02)a | 0.14 (.35) |
| Sample entropy ML | -0.09 (.54) | -0.12 (.43) | -0.16 (.31) |
| Sample entropy AP | 0.39 (.01)a | 0.22 (.15) | 0.02 (.87) |
| Dominant frequency’s amplitude VT | -0.22 (.16) | -0.29 (.06) | -0.19 (.21) |
| Dominant frequency’s amplitude ML | 0.16 (.28) | 0.14 (.34) | 0.15 (.31) |
| Dominant frequency’s amplitude AP | -0.13 (.37) | -0.06 (.71) | 0.07 (.63) |
aSignificant associations of medians and stronger associations of extremes.