Table 5.

Confusion matrix for sleep stages (%).

		Ground truth
		Light sleep	Deep sleep	REM sleep	Wakefulness
Light sleep	Fitbit	69.3	29.1	31.7	50.3
	XGB	87.0	83.0	41.9	64.4
	XGBd	61.7	42.9	22.9	25.7
	XGBu	85.1	78.7	41.1	62.0
	NB + XGB	90.9	85.3	37.3	70.2
	RF + XGB	90.2	82.6	40.1	65.5
	SVM + XGB	91.2	85.4	37.1	71.3
	NB + XGBd	81.0	52.6	33.8	53.4
	RF + XGBd	77.7	49.9	33.1	46.1
	SVM + XGBd	81.5	55.5	33.9	54.8
	NB + XGBu	89.4	79.4	36.8	68.6
	RF + XGBu	88.7	77.9	39.8	63.4
	SVM + XGBu	89.6	81.0	36.3	69.3
Deep sleep	Fitbit	21.6	60.9	3.5	6.5
	XGB	1.1	4.4	0.0	0.4
	XGBd	11.2	39.6	1.7	2.3
	XGBu	1.8	9.3	0.0	0.4
	NB + XGB	1.0	3.8	0.6	0.6
	RF + XGB	1.2	5.4	0.2	0.5
	SVM + XGB	0.8	3.7	0.0	0.5
	NB + XGBd	9.1	36.4	1.5	1.6
	RF + XGBd	9.5	36.3	0.9	1.7
	SVM + XGBd	8.9	34.1	0.7	1.2
	NB + XGBu	1.8	9.4	0.7	0.6
	RF + XGBu	2.0	10.7	0.1	0.5
	SVM + XGBu	1.6	8.7	0.0	0.4
REM sleep	Fitbit	5.9	2.9	59.6	8.1
	XGB	9.5	5.7	54.5	12.0
	XGBd	14.2	7.1	63.9	18.8
	XGBu	8.6	4.9	54.6	12.9
	NB + XGB	6.9	4.0	59.8	9.3
	RF + XGB	6.5	5.0	56.8	11.3
	SVM + XGB	6.9	4.0	60.7	9.3
	NB + XGBd	6.6	3.6	60.4	10.6
	RF + XGBd	7.7	5.5	59.2	12.3
	SVM + XGBd	6.7	3.3	61.0	10.6
	NB + XGBu	7.1	4.2	60.0	10.3
	RF + XGBu	6.4	4.5	56.3	11.0
	SVM + XGBu	7.1	3.6	60.9	10.2
Wakefulness	Fitbit	3.2	2.7	5.3	35.0
	XGB	2.4	2.6	3.6	23.1
	XGBd	12.9	6.1	11.5	53.2
	XGBu	4.5	2.7	4.4	24.7
	NB + XGB	1.2	2.4	2.3	20.0
	RF + XGB	2.0	2.4	2.9	22.7
	SVM + XGB	1.2	2.4	2.2	19.0
	NB + XGBd	3.3	3.1	4.3	34.4
	RF + XGBd	5.1	4.0	6.8	39.9
	SVM + XGBd	2.9	2.8	4.4	33.4
	NB + XGBu	1.7	2.4	2.5	20.5
	RF + XGBu	2.9	2.5	3.7	25.0
	SVM + XGBu	1.6	2.4	2.8	20.0

The bold values indicate the percentage of correctly classified epochs for each sleep stage by different models.