Table 8.

Features extracted from the time-series signals (see Table 6).

Feature	Description	Formula	Group
MeanFreq	Mean frequency of actions	mean(f)	Speed
CovarFreq	Coefficient of variation of the frequency of actions	$\frac{\mathrm{std}\left(\mathrm{f}\right)}{\mathrm{mean}\left(\mathrm{f}\right)}$	Speed
MeanVel	The average of the velocities between peaks and troughs	mean(V)	Speed
CovarVel	Coefficient of variation of the velocities between peaks and troughs	$\frac{\mathrm{std}\left(\mathrm{V}\right)}{\mathrm{mean}\left(\mathrm{V}\right)}$	Speed
MeanAmp	Mean of amplitude of actions	mean(a)	Amplitude
CovarAmp	Coefficient of variation of the amplitude of actions	$\frac{\mathrm{std}\left(\mathrm{a}\right)}{\mathrm{mean}\left(\mathrm{a}\right)}$	Amplitude
PeriodRange	The range of period of actions	range(d)	Hesitations
PrcInv	Average of the rate of inversions between peaks and troughs	mean(I)	Hesitations
Roughness	The median of the absolute jerk divided by absolute acceleration	$\mathrm{median}\left(\frac{s^{″\prime }}{s^{″}}\right)$	Hesitations
DiffAmp	Percentage change between MeanAmp of first third of peaks (denoted AT1) and the last third of peaks (denoted AT3)	$\frac{{\mathrm{A}}^{T3}-{\mathrm{A}}^{T1}}{{\mathrm{A}}^{T1}}$	Decrementing signal
DiffVel	Percentage change between MeanVel of the first third of peaks (denoted WT1) and the last third of peaks (denoted WT3)	$\frac{{\mathrm{W}}^{T3}-{\mathrm{W}}^{T1}}{{\mathrm{W}}^{T1}}$	Decrementing signal

The same 11 features were used for each bradykinesia classification model.