Table 1.

The list of time-domain, frequency domain and nonlinear features reviewed in this work.

Group	Feature Name	Abbr.	Group	Feature Name	Abbr.
Time-domain	Mean		Frequency-domain	θ/β
	Median			(θ + α)/(α + β)
	Variance			γ/δ
	Standard deviation			(γ + β)/(δ + α)
	Skewness			Reflection coefficients
	Kurtosis			Partial correlation coefficient
	Zero-crossing rate	ZCR		Wavelet coefficients
	Number of waves			Phase coupling
	Wave duration		Nonlinear	Hurst exponent	H
	Peak amplitude			Renyi scaling exponent
	Instantaneous frequency	IF		Renyi gener. dim. multifractals
	Hjorth parameters			Capacity dimension D0	D0
	Mobility			Information dimension D1	D1
	Activity			Correlation dimension D2	D2
	Complexity			Katz fractal dimension	KFD
	K-complex			Petrosian fractal dimension	PFD
	Energy	E		Higuchi fractal dimension	HFD
Frequency-domain	Mean			Fractal spectrum
	Median			Lyapunov exponents	LE
	Variance			Lempel-Ziv complexity	LZC
	Standard deviation			Central tendency measure	CTM
	Skewness			Auto-mutual information	AMI
	Kurtosis			Temporal irreversibility
	Delta	δ		Recurrence rate	RR
	Theta	θ		Determinism	Det
	Alpha	α		Laminarity	Lam
	Beta	β		Average diagonal line length	L
	Gamma	γ		Maximum length of diagonal	Lmax
	Sigma	σ		Max. length of vertical lines	Vmax
	θ/α			Trapping time	TT
	β/α			Divergence	Div
	(θ + α)/β			Entropy of recurrence plot	ENTR