Table 5.

Comparison of ECG-based sleep stage scoring studies.

Author	Signal	Method	Classes	Accuracy
Adnane et al. [13]	HRV	SVM	2	79.9
Xiao et al. [14]	HRV	RF	3	72.5
Ebrahimi et al. [27]	HRV, Resp.	SVM	4	89.3
Singh et al. [15]	RR interval	SVM	2	72.8
Yücelbaş et al. [16]	ECG	RF	3	78.0
Wei et al. [17]	ECG	DNN	3	77.8
Li et al. [18]	ECG→CRC	CNN	3	73.0
Radha et al. [19]	HRV,	LSTM	5	72.9
Zhang et al. [28]	HR, Actigraphy	RNN	3	66.6
This study	ECG	DCR	5	74.2
			3	86.4