. Author manuscript; available in PMC: 2022 Mar 5.

Published in final edited form as: IEEE J Biomed Health Inform. 2021 Mar 5;25(3):634–646. doi: 10.1109/JBHI.2020.3009903

TABLE I.

SCG Features Extracted

Signals	Feature Names	Number of Features
Signals	Feature Names	Ampl.	Time	Freq.
SCG (0-200 ms)	Highest and second highest peak (Ampl., Loc. and Width)	2	4
	Lowest and second lowest valley (Ampl., Loc. And Width)	2	4
	Number of peaks and valleys		2
	First and second peak (Ampl., Loc. And Width)	2	4
	First and second valley (Ampl., Loc. And Width)	2	4
	Highest peak of absolute signal (Ampl., Loc. And Width)	1	2
SCG (200-500 ms)	Highest peak (Ampl., Loc. and Width)	1	2
	Lowest valley (Ampl., Loc. And Width)	1	2
	Number of peaks and valleys		2
	Highest peak of absolute signal (Ampl., Loc. And Width)	1	2
SCG AUS	(0-100 ms), …, (400-500 ms)	5
SCG PSD Band Power	(0-3 Hz), (3-6 Hz), …, (27-30 Hz) and (0-500 Hz)			11
SCG PSD	First, second and third prominent frequency (Ampl. and Freq.)			6
Single Axis Total		17	28	17
4-Axes Total		68	112	68

Ampl: amplitude, Freq: frequency, Loc: location, AUS: area under signal, PSD: power spectral density.