TABLE 3. Statistical Analysis of the Transition Features.
| Domain | Feature | Sit-to-stand transitions from the non-dominant hand (82 participants) | |||||
|---|---|---|---|---|---|---|---|
| Mean | 95% CI | Adjusted p-valuea | hICC (95% CI) | ||||
| Non-fallers | Fallers | Non-fallers | Fallers | ||||
| Time | bPeak_VT, [g] | 1.25 | 1.18 | 1.23–1.28 | 1.11–1.25 | 0.136 | 0.81 (0.76–0.85) |
| Peak_AP, [g] | 1.02 | 0.96 | 0.99–1.05 | 0.88–1.04 | 0.391 | 0.90 (0.87–0.93) | |
| Peak_ML, [g] | 0.72 | 0.78 | 0.69–0.74 | 0.72–0.85 | 0.034 | 0.87 (0.82–0.90) | |
| Jerk_SVM | 0.0021 | 0.0025 | 0.0021–0.0023 | 0.0022–0.0029 | 0.097 | 0.77 (0.72–0.82) | |
| Median_SVM, [g] | 1.0081 | 1.0050 | 0.9992–1.0171 | 0.97–1.03 | 0.220 | 0.82 (0.78–0.87) | |
| dTTFS, [s] | 1.72 | 1.75 | 1.62–1.82 | 1.49–2.02 | 0.968 | 0.81 (0.76–0.85) | |
| fAFS, [g] | 1.13 | 1.18 | 1.07–1.19 | 1.01–1.35 | 0.753 | 0.75 (0.70–0.81) | |
| Oscillation_ML | 0.0026 | 0.0028 | 0.0023–0.0029 | 0.0021–0.0035 | 0.015* | 0.80 (0.76–0.85) | |
| Oscillation_VT | 0.0029 | 0.0028 | 0.0024–0.0035 | 0.0024–0.0033 | 0.097 | 0.82(0.78–0.87) | |
| Oscillation_AP | 0.0059 | 0.0057 | 0.0051–0.0067 | 0.0039–0.0075 | 0.199 | 0.82 (0.79–0.87) | |
| Frequency | gAS | 0.0078 | 0.0059 | 0.0070–0.0085 | 0.0051–0.0066 | 0.020* | 0.83 (0.77–0.88) |
| hIH_VT | 25.5 | 23.4 | 24.3–26.7 | 18.4–28.6 | 0.005* | 0.59 (0.52–0.67) | |
| IH_AP | 16.4 | 20.5 | 15.6–17.1 | 15.1–25.6 | 0.253 | 0.85 (0.81–0.89) | |
| IH_ML | 12.0 | 15.4 | 11.1–12.9 | 11.7–19.1 | 0.585 | 0.77 (0.72–0.83) | |
| iFF_VT | 1.29 | 1.31 | 1.22–1.38 | 1.17–1.44 | 0.168 | 0.80 (0.75–0.85) | |
| Entropy_VT | 5.22 | 5.15 | 5.17–5.26 | 5.01–5.29 | 0.002* | 0.82 (0.77–0.86) | |
| Entropy_AP | 5.01 | 5.04 | 4.96–5.05 | 4.91–5.17 | 0.591 | 0.92 (0.90–0.94) | |
| Entropy_ML | 4.89 | 4.91 | 4.85–4.94 | 4.78–5.04 | 0.591 | 0.88 (0.85–0.91) | |
| Energy_VT | 0.81 | 0.65 | 0.79–0.84 | 0.59–0.71 | p<0.001* | 0.89 (0.87–0.93) | |
| Energy_AP | 0.32 | 0.37 | 0.31–0.34 | 0.33–0.41 | 0.032 | 0.82 (0.77–0.86) | |
| Energy_ML | 0.19 | 0.25 | 0.18–0.20 | 0.22–0.29 | 0.005* | 0.80 (0.76–0.84) | |
P-values adjusted for the multiple comparison;
VT depicts X axis of the local coordination system of the sensor, AP is the Y axis, while ML is the Z axis;
cTTFS = Time To First Arm Swing;
AFS = Amplitude of the First Step;
eAS = Amount of Support;
IH = Index of Harmonicity;
FF = Fundamental Frequency;
ICC = Interclass correlation coefficient; P-values depicted with
are lower than the critical Benjamini-Hochberg p-value (p<0.021).