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. 2016 Dec 1;4:2700211. doi: 10.1109/JTEHM.2016.2620177

TABLE 2. Statistical Analysis of the Transition Features.

Domain Feature Sit-to-stand transitions from the dominant hand (54 participants)
Mean 95% CI Adjusted p-valuea hICC (95% CI)
Non-fallers Fallers Non-fallers Fallers
Time bPeak_VT, [g] 1.27 1.17 1.25–1.30 1.09–1.26 0.253 0.79 (0.74–0.84)
Peak_AP, [g] 0.38 0.73 0.36–0.40 0.61–0.85 p<0.001* 0.81 (0.76–0.85)
Peak_ML, [g] 0.862 0.79 0.84–0.88 0.68–0.90 0.137 0.84 (0.80–0.88)
Jerk_SVM 0.0032 0.0025 0.0032–0.0034 0.0019–0.0030 p<0.001* 0.63 (0.56–0.71)
Median_SVM, [g] 1.0105 0.9945 1.0041–1.0170 0.9572–1.0319 0.623 0.87 (0.84–0.91)
dTTFS, [s] 1.75 1.30 1.67–1.83 1.40–1.81 0.150 0.89 (0.86–0.92)
fAFS, [g] 1.27 0.94 1.22–1.33 0.60–1.27 0.096 0.91 (0.88–0.93)
Oscillation_ML 0.0040 0.0025 0.0034–0.0046 0.0019–0.0033 0.137 0.74 (0.69–0.81)
Oscillation_VT 0.0046 0.0022 0.0041–0.0052 0.0018–0.0027 0.078 0.75 (0.69–0.81)
Oscillation_AP 0.0073 0.0051 0.0066–0.0081 0.0037–0.0065 0.253 0.77 (0.72–0.82)
Frequency gAS 0.0095 0.0052 0.0086–0.0104 0.0044–0.0059 0.027 0.83 (0.80–0.88)
hIH_VT 25.8 22.5 24.6–26.9 18.1–26.8 0.096 0.68 (0.61–0.75)
IH_AP 14.1 16.7 13.5–14.7 11.4–22.1 0.652 0.78 (0.73–0.83)
IH_ML 16.1 13.8 15.2–17.1 11.0–16.6 0.508 0.76 (0.70–0.81)
iFF_VT 1.23 1.19 1.18–1.27 1.02–1.37 0.623 0.82 (0.78–0.87)
Entropy_VT 5.25 5.08 5.22–5.28 4.87–5.28 0.508 0.78 (0.73–0.84)
Entropy_AP 5.01 4.91 4.98–5.04 4.71–5.10 0.698 0.83 (0.79–0.88)
Entropy_ML 5.05 4.91 5.02–5.08 4.72–5.11 0.623 0.85 (0.81–0.89)
Energy_VT 0.75 0.69 0.73–0.77 0.61–0.77 0.278 0.80 (0.76–0.84)
Energy_AP 0.29 0.32 0.28–0.30 0.26–0.37 0.623 0.80 (0.75–0.84)
Energy_ML 0.28 0.26 0.27–0.29 0.21–0.31 0.612 0.84 (0.79–0.90)
a

P-values adjusted for the multiple comparison;

b

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;

d

AFS = Amplitude of the First Step;

eAS = Amount of Support;

f

IH = Index of Harmonicity;

g

FF = Fundamental Frequency;

h

ICC = Interclass correlation coefficient; P-values depicted with

*

are lower than the critical Benjamini-Hochberg p-value (p<0.014).