On Consistency of Cross-Approximate Entropy in Cardiovascular and Artificial Environments

Table 1

Threshold abbreviations and definitions.

Abbreviation	Definition
	ApEn threshold, expressed in units of time series
	XApEn threshold, dimensionless
	Threshold obtained from threshold profile, for which (X)ApEn reaches its maximal value [17]
	Automatically calculated ApEn threshold using (18)
	Automatically calculated XApEn threshold using (17)
	Automatically calculated XApEn threshold for which at least 95% of the estimated probabilities satisfy weak criterion.
	Automatically calculated XApEn threshold for which at least 95% of the estimated probabilities satisfy strong criterion.